fontfaceobserver - npm Package Compare versions

Comparing version 2.0.13 to 2.1.0

fontfaceobserver.js

@@ -1,12 +0,12 @@
-/* Font Face Observer v2.0.13 - © Bram Stein. License: BSD-3-Clause */(function(){'use strict';var f,g=[];function l(a){g.push(a);1==g.length&&f()}function m(){for(;g.length;)g[0](),g.shift()}f=function(){setTimeout(m)};function n(a){this.a=p;this.b=void 0;this.f=[];var b=this;try{a(function(a){q(b,a)},function(a){r(b,a)})}catch(c){r(b,c)}}var p=2;function t(a){return new n(function(b,c){c(a)})}function u(a){return new n(function(b){b(a)})}function q(a,b){if(a.a==p){if(b==a)throw new TypeError;var c=!1;try{var d=b&&b.then;if(null!=b&&"object"==typeof b&&"function"==typeof d){d.call(b,function(b){c||q(a,b);c=!0},function(b){c||r(a,b);c=!0});return}}catch(e){c||r(a,e);return}a.a=0;a.b=b;v(a)}}
+/* Font Face Observer v2.1.0 - © Bram Stein. License: BSD-3-Clause */(function(){'use strict';var f,g=[];function l(a){g.push(a);1==g.length&&f()}function m(){for(;g.length;)g[0](),g.shift()}f=function(){setTimeout(m)};function n(a){this.a=p;this.b=void 0;this.f=[];var b=this;try{a(function(a){q(b,a)},function(a){r(b,a)})}catch(c){r(b,c)}}var p=2;function t(a){return new n(function(b,c){c(a)})}function u(a){return new n(function(b){b(a)})}function q(a,b){if(a.a==p){if(b==a)throw new TypeError;var c=!1;try{var d=b&&b.then;if(null!=b&&"object"==typeof b&&"function"==typeof d){d.call(b,function(b){c||q(a,b);c=!0},function(b){c||r(a,b);c=!0});return}}catch(e){c||r(a,e);return}a.a=0;a.b=b;v(a)}}
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-(function(){function l(a,b){document.addEventListener?a.addEventListener("scroll",b,!1):a.attachEvent("scroll",b)}function m(a){document.body?a():document.addEventListener?document.addEventListener("DOMContentLoaded",function c(){document.removeEventListener("DOMContentLoaded",c);a()}):document.attachEvent("onreadystatechange",function k(){if("interactive"==document.readyState||"complete"==document.readyState)document.detachEvent("onreadystatechange",k),a()})};function r(a){this.a=document.createElement("div");this.a.setAttribute("aria-hidden","true");this.a.appendChild(document.createTextNode(a));this.b=document.createElement("span");this.c=document.createElement("span");this.h=document.createElement("span");this.f=document.createElement("span");this.g=-1;this.b.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.c.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";
+(function(){function l(a,b){document.addEventListener?a.addEventListener("scroll",b,!1):a.attachEvent("scroll",b)}function m(a){document.body?a():document.addEventListener?document.addEventListener("DOMContentLoaded",function c(){document.removeEventListener("DOMContentLoaded",c);a()}):document.attachEvent("onreadystatechange",function k(){if("interactive"==document.readyState||"complete"==document.readyState)document.detachEvent("onreadystatechange",k),a()})};function t(a){this.a=document.createElement("div");this.a.setAttribute("aria-hidden","true");this.a.appendChild(document.createTextNode(a));this.b=document.createElement("span");this.c=document.createElement("span");this.h=document.createElement("span");this.f=document.createElement("span");this.g=-1;this.b.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.c.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";
 this.f.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.h.style.cssText="display:inline-block;width:200%;height:200%;font-size:16px;max-width:none;";this.b.appendChild(this.h);this.c.appendChild(this.f);this.a.appendChild(this.b);this.a.appendChild(this.c)}
-function t(a,b){a.a.style.cssText="max-width:none;min-width:20px;min-height:20px;display:inline-block;overflow:hidden;position:absolute;width:auto;margin:0;padding:0;top:-999px;white-space:nowrap;font-synthesis:none;font:"+b+";"}function y(a){var b=a.a.offsetWidth,c=b+100;a.f.style.width=c+"px";a.c.scrollLeft=c;a.b.scrollLeft=a.b.scrollWidth+100;return a.g!==b?(a.g=b,!0):!1}function z(a,b){function c(){var a=k;y(a)&&a.a.parentNode&&b(a.g)}var k=a;l(a.b,c);l(a.c,c);y(a)};function A(a,b){var c=b||{};this.family=a;this.style=c.style||"normal";this.weight=c.weight||"normal";this.stretch=c.stretch||"normal"}var B=null,C=null,E=null,F=null;function G(){if(null===C)if(J()&&/Apple/.test(window.navigator.vendor)){var a=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))(?:\.([0-9]+))/.exec(window.navigator.userAgent);C=!!a&&603>parseInt(a[1],10)}else C=!1;return C}function J(){null===F&&(F=!!document.fonts);return F}
+function u(a,b){a.a.style.cssText="max-width:none;min-width:20px;min-height:20px;display:inline-block;overflow:hidden;position:absolute;width:auto;margin:0;padding:0;top:-999px;white-space:nowrap;font-synthesis:none;font:"+b+";"}function z(a){var b=a.a.offsetWidth,c=b+100;a.f.style.width=c+"px";a.c.scrollLeft=c;a.b.scrollLeft=a.b.scrollWidth+100;return a.g!==b?(a.g=b,!0):!1}function A(a,b){function c(){var a=k;z(a)&&a.a.parentNode&&b(a.g)}var k=a;l(a.b,c);l(a.c,c);z(a)};function B(a,b){var c=b||{};this.family=a;this.style=c.style||"normal";this.weight=c.weight||"normal";this.stretch=c.stretch||"normal"}var C=null,D=null,E=null,F=null;function G(){if(null===D)if(J()&&/Apple/.test(window.navigator.vendor)){var a=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))(?:\.([0-9]+))/.exec(window.navigator.userAgent);D=!!a&&603>parseInt(a[1],10)}else D=!1;return D}function J(){null===F&&(F=!!document.fonts);return F}
 function K(){if(null===E){var a=document.createElement("div");try{a.style.font="condensed 100px sans-serif"}catch(b){}E=""!==a.style.font}return E}function L(a,b){return[a.style,a.weight,K()?a.stretch:"","100px",b].join(" ")}
-A.prototype.load=function(a,b){var c=this,k=a||"BESbswy",q=0,D=b||3E3,H=(new Date).getTime();return new Promise(function(a,b){if(J()&&!G()){var M=new Promise(function(a,b){function e(){(new Date).getTime()-H>=D?b():document.fonts.load(L(c,'"'+c.family+'"'),k).then(function(c){1<=c.length?a():setTimeout(e,25)},function(){b()})}e()}),N=new Promise(function(a,c){q=setTimeout(c,D)});Promise.race([N,M]).then(function(){clearTimeout(q);a(c)},function(){b(c)})}else m(function(){function u(){var b;if(b=-1!=
-f&&-1!=g||-1!=f&&-1!=h||-1!=g&&-1!=h)(b=f!=g&&f!=h&&g!=h)||(null===B&&(b=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))/.exec(window.navigator.userAgent),B=!!b&&(536>parseInt(b[1],10)||536===parseInt(b[1],10)&&11>=parseInt(b[2],10))),b=B&&(f==v&&g==v&&h==v||f==w&&g==w&&h==w||f==x&&g==x&&h==x)),b=!b;b&&(d.parentNode&&d.parentNode.removeChild(d),clearTimeout(q),a(c))}function I(){if((new Date).getTime()-H>=D)d.parentNode&&d.parentNode.removeChild(d),b(c);else{var a=document.hidden;if(!0===a||void 0===a)f=e.a.offsetWidth,
-g=n.a.offsetWidth,h=p.a.offsetWidth,u();q=setTimeout(I,50)}}var e=new r(k),n=new r(k),p=new r(k),f=-1,g=-1,h=-1,v=-1,w=-1,x=-1,d=document.createElement("div");d.dir="ltr";t(e,L(c,"sans-serif"));t(n,L(c,"serif"));t(p,L(c,"monospace"));d.appendChild(e.a);d.appendChild(n.a);d.appendChild(p.a);document.body.appendChild(d);v=e.a.offsetWidth;w=n.a.offsetWidth;x=p.a.offsetWidth;I();z(e,function(a){f=a;u()});t(e,L(c,'"'+c.family+'",sans-serif'));z(n,function(a){g=a;u()});t(n,L(c,'"'+c.family+'",serif'));
-z(p,function(a){h=a;u()});t(p,L(c,'"'+c.family+'",monospace'))})})};"object"===typeof module?module.exports=A:(window.FontFaceObserver=A,window.FontFaceObserver.prototype.load=A.prototype.load);}());
+B.prototype.load=function(a,b){var c=this,k=a||"BESbswy",r=0,n=b||3E3,H=(new Date).getTime();return new Promise(function(a,b){if(J()&&!G()){var M=new Promise(function(a,b){function e(){(new Date).getTime()-H>=n?b(Error(""+n+"ms timeout exceeded")):document.fonts.load(L(c,'"'+c.family+'"'),k).then(function(c){1<=c.length?a():setTimeout(e,25)},b)}e()}),N=new Promise(function(a,c){r=setTimeout(function(){c(Error(""+n+"ms timeout exceeded"))},n)});Promise.race([N,M]).then(function(){clearTimeout(r);a(c)},
+b)}else m(function(){function v(){var b;if(b=-1!=f&&-1!=g||-1!=f&&-1!=h||-1!=g&&-1!=h)(b=f!=g&&f!=h&&g!=h)||(null===C&&(b=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))/.exec(window.navigator.userAgent),C=!!b&&(536>parseInt(b[1],10)||536===parseInt(b[1],10)&&11>=parseInt(b[2],10))),b=C&&(f==w&&g==w&&h==w||f==x&&g==x&&h==x||f==y&&g==y&&h==y)),b=!b;b&&(d.parentNode&&d.parentNode.removeChild(d),clearTimeout(r),a(c))}function I(){if((new Date).getTime()-H>=n)d.parentNode&&d.parentNode.removeChild(d),b(Error(""+
+n+"ms timeout exceeded"));else{var a=document.hidden;if(!0===a||void 0===a)f=e.a.offsetWidth,g=p.a.offsetWidth,h=q.a.offsetWidth,v();r=setTimeout(I,50)}}var e=new t(k),p=new t(k),q=new t(k),f=-1,g=-1,h=-1,w=-1,x=-1,y=-1,d=document.createElement("div");d.dir="ltr";u(e,L(c,"sans-serif"));u(p,L(c,"serif"));u(q,L(c,"monospace"));d.appendChild(e.a);d.appendChild(p.a);d.appendChild(q.a);document.body.appendChild(d);w=e.a.offsetWidth;x=p.a.offsetWidth;y=q.a.offsetWidth;I();A(e,function(a){f=a;v()});u(e,
+L(c,'"'+c.family+'",sans-serif'));A(p,function(a){g=a;v()});u(p,L(c,'"'+c.family+'",serif'));A(q,function(a){h=a;v()});u(q,L(c,'"'+c.family+'",monospace'))})})};"object"===typeof module?module.exports=B:(window.FontFaceObserver=B,window.FontFaceObserver.prototype.load=B.prototype.load);}());

fontfaceobserver.standalone.js

@@ -1,8 +0,8 @@
-/* Font Face Observer v2.0.13 - © Bram Stein. License: BSD-3-Clause */(function(){function l(a,b){document.addEventListener?a.addEventListener("scroll",b,!1):a.attachEvent("scroll",b)}function m(a){document.body?a():document.addEventListener?document.addEventListener("DOMContentLoaded",function c(){document.removeEventListener("DOMContentLoaded",c);a()}):document.attachEvent("onreadystatechange",function k(){if("interactive"==document.readyState||"complete"==document.readyState)document.detachEvent("onreadystatechange",k),a()})};function r(a){this.a=document.createElement("div");this.a.setAttribute("aria-hidden","true");this.a.appendChild(document.createTextNode(a));this.b=document.createElement("span");this.c=document.createElement("span");this.h=document.createElement("span");this.f=document.createElement("span");this.g=-1;this.b.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.c.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";
+/* Font Face Observer v2.1.0 - © Bram Stein. License: BSD-3-Clause */(function(){function l(a,b){document.addEventListener?a.addEventListener("scroll",b,!1):a.attachEvent("scroll",b)}function m(a){document.body?a():document.addEventListener?document.addEventListener("DOMContentLoaded",function c(){document.removeEventListener("DOMContentLoaded",c);a()}):document.attachEvent("onreadystatechange",function k(){if("interactive"==document.readyState||"complete"==document.readyState)document.detachEvent("onreadystatechange",k),a()})};function t(a){this.a=document.createElement("div");this.a.setAttribute("aria-hidden","true");this.a.appendChild(document.createTextNode(a));this.b=document.createElement("span");this.c=document.createElement("span");this.h=document.createElement("span");this.f=document.createElement("span");this.g=-1;this.b.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.c.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";
 this.f.style.cssText="max-width:none;display:inline-block;position:absolute;height:100%;width:100%;overflow:scroll;font-size:16px;";this.h.style.cssText="display:inline-block;width:200%;height:200%;font-size:16px;max-width:none;";this.b.appendChild(this.h);this.c.appendChild(this.f);this.a.appendChild(this.b);this.a.appendChild(this.c)}
-function t(a,b){a.a.style.cssText="max-width:none;min-width:20px;min-height:20px;display:inline-block;overflow:hidden;position:absolute;width:auto;margin:0;padding:0;top:-999px;white-space:nowrap;font-synthesis:none;font:"+b+";"}function y(a){var b=a.a.offsetWidth,c=b+100;a.f.style.width=c+"px";a.c.scrollLeft=c;a.b.scrollLeft=a.b.scrollWidth+100;return a.g!==b?(a.g=b,!0):!1}function z(a,b){function c(){var a=k;y(a)&&a.a.parentNode&&b(a.g)}var k=a;l(a.b,c);l(a.c,c);y(a)};function A(a,b){var c=b||{};this.family=a;this.style=c.style||"normal";this.weight=c.weight||"normal";this.stretch=c.stretch||"normal"}var B=null,C=null,E=null,F=null;function G(){if(null===C)if(J()&&/Apple/.test(window.navigator.vendor)){var a=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))(?:\.([0-9]+))/.exec(window.navigator.userAgent);C=!!a&&603>parseInt(a[1],10)}else C=!1;return C}function J(){null===F&&(F=!!document.fonts);return F}
+function u(a,b){a.a.style.cssText="max-width:none;min-width:20px;min-height:20px;display:inline-block;overflow:hidden;position:absolute;width:auto;margin:0;padding:0;top:-999px;white-space:nowrap;font-synthesis:none;font:"+b+";"}function z(a){var b=a.a.offsetWidth,c=b+100;a.f.style.width=c+"px";a.c.scrollLeft=c;a.b.scrollLeft=a.b.scrollWidth+100;return a.g!==b?(a.g=b,!0):!1}function A(a,b){function c(){var a=k;z(a)&&a.a.parentNode&&b(a.g)}var k=a;l(a.b,c);l(a.c,c);z(a)};function B(a,b){var c=b||{};this.family=a;this.style=c.style||"normal";this.weight=c.weight||"normal";this.stretch=c.stretch||"normal"}var C=null,D=null,E=null,F=null;function G(){if(null===D)if(J()&&/Apple/.test(window.navigator.vendor)){var a=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))(?:\.([0-9]+))/.exec(window.navigator.userAgent);D=!!a&&603>parseInt(a[1],10)}else D=!1;return D}function J(){null===F&&(F=!!document.fonts);return F}
 function K(){if(null===E){var a=document.createElement("div");try{a.style.font="condensed 100px sans-serif"}catch(b){}E=""!==a.style.font}return E}function L(a,b){return[a.style,a.weight,K()?a.stretch:"","100px",b].join(" ")}
-A.prototype.load=function(a,b){var c=this,k=a||"BESbswy",q=0,D=b||3E3,H=(new Date).getTime();return new Promise(function(a,b){if(J()&&!G()){var M=new Promise(function(a,b){function e(){(new Date).getTime()-H>=D?b():document.fonts.load(L(c,'"'+c.family+'"'),k).then(function(c){1<=c.length?a():setTimeout(e,25)},function(){b()})}e()}),N=new Promise(function(a,c){q=setTimeout(c,D)});Promise.race([N,M]).then(function(){clearTimeout(q);a(c)},function(){b(c)})}else m(function(){function u(){var b;if(b=-1!=
-f&&-1!=g||-1!=f&&-1!=h||-1!=g&&-1!=h)(b=f!=g&&f!=h&&g!=h)||(null===B&&(b=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))/.exec(window.navigator.userAgent),B=!!b&&(536>parseInt(b[1],10)||536===parseInt(b[1],10)&&11>=parseInt(b[2],10))),b=B&&(f==v&&g==v&&h==v||f==w&&g==w&&h==w||f==x&&g==x&&h==x)),b=!b;b&&(d.parentNode&&d.parentNode.removeChild(d),clearTimeout(q),a(c))}function I(){if((new Date).getTime()-H>=D)d.parentNode&&d.parentNode.removeChild(d),b(c);else{var a=document.hidden;if(!0===a||void 0===a)f=e.a.offsetWidth,
-g=n.a.offsetWidth,h=p.a.offsetWidth,u();q=setTimeout(I,50)}}var e=new r(k),n=new r(k),p=new r(k),f=-1,g=-1,h=-1,v=-1,w=-1,x=-1,d=document.createElement("div");d.dir="ltr";t(e,L(c,"sans-serif"));t(n,L(c,"serif"));t(p,L(c,"monospace"));d.appendChild(e.a);d.appendChild(n.a);d.appendChild(p.a);document.body.appendChild(d);v=e.a.offsetWidth;w=n.a.offsetWidth;x=p.a.offsetWidth;I();z(e,function(a){f=a;u()});t(e,L(c,'"'+c.family+'",sans-serif'));z(n,function(a){g=a;u()});t(n,L(c,'"'+c.family+'",serif'));
-z(p,function(a){h=a;u()});t(p,L(c,'"'+c.family+'",monospace'))})})};"object"===typeof module?module.exports=A:(window.FontFaceObserver=A,window.FontFaceObserver.prototype.load=A.prototype.load);}());
+B.prototype.load=function(a,b){var c=this,k=a||"BESbswy",r=0,n=b||3E3,H=(new Date).getTime();return new Promise(function(a,b){if(J()&&!G()){var M=new Promise(function(a,b){function e(){(new Date).getTime()-H>=n?b(Error(""+n+"ms timeout exceeded")):document.fonts.load(L(c,'"'+c.family+'"'),k).then(function(c){1<=c.length?a():setTimeout(e,25)},b)}e()}),N=new Promise(function(a,c){r=setTimeout(function(){c(Error(""+n+"ms timeout exceeded"))},n)});Promise.race([N,M]).then(function(){clearTimeout(r);a(c)},
+b)}else m(function(){function v(){var b;if(b=-1!=f&&-1!=g||-1!=f&&-1!=h||-1!=g&&-1!=h)(b=f!=g&&f!=h&&g!=h)||(null===C&&(b=/AppleWebKit\/([0-9]+)(?:\.([0-9]+))/.exec(window.navigator.userAgent),C=!!b&&(536>parseInt(b[1],10)||536===parseInt(b[1],10)&&11>=parseInt(b[2],10))),b=C&&(f==w&&g==w&&h==w||f==x&&g==x&&h==x||f==y&&g==y&&h==y)),b=!b;b&&(d.parentNode&&d.parentNode.removeChild(d),clearTimeout(r),a(c))}function I(){if((new Date).getTime()-H>=n)d.parentNode&&d.parentNode.removeChild(d),b(Error(""+
+n+"ms timeout exceeded"));else{var a=document.hidden;if(!0===a||void 0===a)f=e.a.offsetWidth,g=p.a.offsetWidth,h=q.a.offsetWidth,v();r=setTimeout(I,50)}}var e=new t(k),p=new t(k),q=new t(k),f=-1,g=-1,h=-1,w=-1,x=-1,y=-1,d=document.createElement("div");d.dir="ltr";u(e,L(c,"sans-serif"));u(p,L(c,"serif"));u(q,L(c,"monospace"));d.appendChild(e.a);d.appendChild(p.a);d.appendChild(q.a);document.body.appendChild(d);w=e.a.offsetWidth;x=p.a.offsetWidth;y=q.a.offsetWidth;I();A(e,function(a){f=a;v()});u(e,
+L(c,'"'+c.family+'",sans-serif'));A(p,function(a){g=a;v()});u(p,L(c,'"'+c.family+'",serif'));A(q,function(a){h=a;v()});u(q,L(c,'"'+c.family+'",monospace'))})})};"object"===typeof module?module.exports=B:(window.FontFaceObserver=B,window.FontFaceObserver.prototype.load=B.prototype.load);}());

package.json

 {
   "name": "fontfaceobserver",
-  "version": "2.0.13",
+  "version": "2.1.0",
   "description": "Detect if web fonts are available",
@@ -39,3 +39,3 @@ "directories": {
     "google-closure-compiler": "=20161024.0.0",
-    "grunt": "^0.4.5",
+    "grunt": "^1.0.3",
     "grunt-contrib-clean": "^1.0.0",
@@ -45,3 +45,3 @@ "grunt-contrib-concat": "^1.0.1",
     "grunt-exec": "~1.0.0",
-    "mocha": "^2.5.3",
+    "mocha": "^5.2.0",
     "mocha-phantomjs-core": "^2.0.0",
@@ -48,0 +48,0 @@ "phantomjs-prebuilt": "^2.1.7",

README.md

 # Font Face Observer [![Build Status](https://travis-ci.org/bramstein/fontfaceobserver.png?branch=master)](https://travis-ci.org/bramstein/fontfaceobserver)
 
-Font Face Observer is a small `@font-face` loader and monitor (3.5KB minified and 1.3KB gzipped) compatible with any web font service. It will monitor when a web font is applied to the page and notify you. It does not limit you in any way in where, when, or how you load your web fonts. Unlike the [Web Font Loader](https://github.com/typekit/webfontloader) Font Face Observer uses scroll events to detect font loads efficiently and with minimum overhead.
+Font Face Observer is a small `@font-face` loader and monitor (3.5KB minified and 1.3KB gzipped) compatible with any webfont service. It will monitor when a webfont is loaded and notify you. It does not limit you in any way in where, when, or how you load your webfonts. Unlike the [Web Font Loader](https://github.com/typekit/webfontloader) Font Face Observer uses scroll events to detect font loads efficiently and with minimum overhead.
 
 ## How to use
 
-Include your `@font-face` rules as usual. Fonts can be supplied by either a font service such as [Google Fonts](http://www.google.com/fonts), [Typekit](http://typekit.com), and [Webtype](http://webtype.com) or be self-hosted. It doesn't matter where, when, or how you load your fonts. You can set up monitoring for a single font family at a time:
+Include your `@font-face` rules as usual. Fonts can be supplied by either a font service such as [Google Fonts](http://www.google.com/fonts), [Typekit](http://typekit.com), and [Webtype](http://webtype.com) or be self-hosted. You can set up monitoring for a single font family at a time:
 
@@ -21,5 +21,5 @@ ```js
 
-The `FontFaceObserver` constructor takes two arguments: the font family name (required) and an object describing the variation (optional). The object can contain `weight`, `style`, and `stretch` properties. If a property is not present it will default to `normal`. To start observing font loads, call the `load` method. It'll immediately return a new Promise that resolves when the font is available and rejected when the font is not available.
+The `FontFaceObserver` constructor takes two arguments: the font-family name (required) and an object describing the variation (optional). The object can contain `weight`, `style`, and `stretch` properties. If a property is not present it will default to `normal`. To start loading the font, call the `load` method. It'll immediately return a new Promise that resolves when the font is loaded and rejected when the font fails to load.
 
-If your font doesn't contain latin characters you can pass a custom test string to the `load` method.
+If your font doesn't contain at least the latin "BESbwy" characters you must pass a custom test string to the `load` method.
 
@@ -48,3 +48,3 @@ ```js
 
-Multiple fonts can be loaded by creating a FontFaceObserver instance for each.
+Multiple fonts can be loaded by creating a `FontFaceObserver` instance for each.
 
@@ -75,5 +75,42 @@ ```js
 
-The following example emulates FOUT with Font Face Observer for "My Family".
+If you are working with a large number of fonts, you may decide to create `FontFaceObserver` instances dynamically:
 
 ```js
+// An example collection of font data with additional metadata,
+// in this case “color.”
+var exampleFontData = {
+  'Family A': { weight: 400, color: 'red' },
+  'Family B': { weight: 400, color: 'orange' },
+  'Family C': { weight: 900, color: 'yellow' },
+  // Etc.
+};
+
+var observers = [];
+
+// Make one observer for each font,
+// by iterating over the data we already have
+Object.keys(exampleFontData).forEach(function(family) {
+  var data = exampleFontData[family];
+  var obs = new FontFaceObserver(family, data);
+  observers.push(obs.load());
+});
+
+Promise.all(observers)
+  .then(function(fonts) {
+    fonts.forEach(function(font) {
+      console.log(font.family + ' ' + font.weight + ' ' + 'loaded');
+
+      // Map the result of the Promise back to our existing data,
+      // to get the other properties we need.
+      console.log(exampleFontData[font.family].color);
+    });
+  })
+  .catch(function(err) {
+    console.warn('Some critical font are not available:', err);
+  });
+```
+
+The following example emulates FOUT with Font Face Observer for `My Family`.
+
+```js
 var font = new FontFaceObserver('My Family');
@@ -131,2 +168,2 @@
 
-Font Face Observer is licensed under the BSD License. Copyright 2014-2016 Bram Stein. All rights reserved.
+Font Face Observer is licensed under the BSD License. Copyright 2014-2017 Bram Stein. All rights reserved.

src/observer.js

@@ -198,3 +198,3 @@ goog.provide('fontface.Observer');
             if (now - start >= timeoutValue) {
-              reject();
+              reject(new Error('' + timeoutValue + 'ms timeout exceeded'));
             } else {
@@ -207,5 +207,3 @@ document.fonts.load(that.getStyle('"' + that['family'] + '"'), testString).then(function (fonts) {
                 }
-              }, function () {
-                reject();
-              });
+              }, reject);
             }
@@ -217,3 +215,6 @@ };
         var timer = new Promise(function (resolve, reject) {
-          timeoutId = setTimeout(reject, timeoutValue);
+          timeoutId = setTimeout(
+            function() { reject(new Error('' + timeoutValue + 'ms timeout exceeded')); },
+            timeoutValue
+          );
         });
@@ -224,5 +225,3 @@
           resolve(that);
-        }, function () {
-          reject(that);
-        });
+        }, reject);
       } else {
@@ -313,3 +312,3 @@ dom.waitForBody(function () {
               removeContainer();
-              reject(that);
+              reject(new Error('' + timeoutValue + 'ms timeout exceeded'));
             } else {
@@ -316,0 +315,0 @@ var hidden = document['hidden'];

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