A robust & optimized ES3-compatible polyfill for the `String.prototype.at` proposal for ECMAScript 6/7 - based on https://mths.be/at
A robust & optimized ES3-compatible polyfill for the String.prototype.at proposal for ECMAScript 6/7.
This code is almost entirely copied from @mathiasbynens's excellent polyfill at https://mths.be/at - I created this one so that it did not automatically modify String.prototype, and so that it would fit in more neatly with the es7-shim.
Use it as a standalone function, or call its shim method to install it as a polyfill.
var at = require('string-at');
var assert = require('assert');
var surrogatePair = '\uD834\uDF06 abc'; // a surrogate pair
assert(surrogatePair.length === 6);
assert(at(surrogatePair, 0) === '\uD834\uDF06');
assert(at(surrogatePair, 1) === '\uDF06');
var i = 0;
var str = '';
while (str.length < surrogatePair.length) {
str += at(surrogatePair, str.length);
i += 1;
}
assert(str === surrogatePair);
assert(i === 4); // 4 code points
assert(str.length === 6); // 6 "characters"
at.shim();
assert(surrogatePair.at(0) === at(surrogatePair, 0));
Simply clone the repo, npm install, and run npm test
v1.1.0 - 2019-12-19
cb8740cdefine-properties, tape, eslint, semver, es5-shim; use my personal shared eslint config. 4c0b886jscs d47b0eanode v8.2, v7.10, v6.11, v4.8; newer npm breaks on older node; improve matrix 44e9dc346aa4a2node v11.6, v10.15, v8.15, v6.16 30532b9node v9.2; v8.9; v6.12; use nvm install-latest-npm; pin included builds to LTS. 226999ctape, jscs, nsp, eslint, @ljharb/eslint-config, semver, es5-shim, es6-shim c31b8b0auto-changelog c5fc05enode v12.7, v11.15, v10.16, v8.16, v6.17; use nvm install-latest-npm d4444bbnode v10.0, v9.11, v8.11, v6.14, v4.9 b69db22es-abstract, jscs, eslint, @ljharb/eslint-config, es6-shim 3839e7dnsp, eslint, es5-shim, es6-shim fa89f64node v7.2, v6.9, v4.6; improve test matrix; allow coverage to fail. 6bb9230@es-shims/api, @ljharb/eslint-config, eslint, nsp, tape, semver ca95176eslint, @ljharb/eslint-config, replace b994ee8node v5.6, v4.3 ec9187etape, jscs, eslint, @ljharb/eslint-config, es5-shim, es6-shim 7597246define-properties, eslint, semver, es5-shim, es6-shim c147b44jscs, eslint, @ljharb/eslint-config a46f365tape, jscs, nsp, eslint, @ljharb/eslint-config 5fe26c7jscs, nsp, eslint, es5-shim 20ee134es-abstract (78% bundle size decrease) f01bb1eeslint, @ljharb/eslint-config, covert, replace, semver, tape, es5-shim, es6-shim 32c06c2tape, jscs, nsp, eslint, @ljharb/eslint-config, semver 7e6eeecjscs, eslint, @ljharb/eslint-config, es5-shim, es6-shim 5433d9886cb327jscs, nsp, eslint, @ljharb/eslint-config, es5-shim, es6-shim b4e41b5jscs, eslint, @ljharb/eslint-config dbe9284jscs, nsp, eslint, @ljharb/eslint-config, semver, es5-shim, es6-shim e25e94cab0891ces5-shim, es6-shim, eslint, replace, semver, tape ef73bb8tape, jscs, nsp, eslint, @ljharb/eslint-config, semver 00ac6fe@es-shims/api, es5-shim, eslint, nsp, semver, tape 284e78cio.js v3.3, node v4.1 c7d5cc7eslint, @ljharb/eslint-config, functions-have-names, tape 001bdf1node v12.11 658bd56npm audit instead of nsp 3cda4dfnsp, eslint, @ljharb/eslint-config, es6-shim 6655a7cpretest/posttest b6e180fnode v5.9, v4.4 2519b15jscs 954e885io.js v2.2 e56a178npx aud instead of nsp or npm audit with hoops e75464enode v6.2 24cbf33eslint, @ljharb/eslint-config, nsp e48cfb162754a7tape, eslint, @ljharb/eslint-config bcb53c6bd09780eslint, @ljharb/eslint-config 8e1b5e8node v12.8 62b166dsemver, tape aa12572eclint instead of editorconfig-tools d09a00fdefine-properties, es-abstract da9ce3d@es-shims/api, replace 0361c7enode v10.1 abe2801es-abstract, function-bind 8ca4a62es-abstract, function-bind ce5560bdefine-properties, es-abstract f7392c2tape, eslint e831ec8funding field 16721edfunctions-have-names 12e5b3cauto entry point 7c46663es-abstract 7fe28a4semver 608f43ces-abstract d63023bes-abstract 4f71450es-abstract ebd0b7enode v5.12 adcd99des-abstract 9b80bcanode v5.10 5896da7node v5.7 b630576node v4.2 ecf605aes-abstract 9712990es-abstract 0979ce2tape fad1430tape 92b7c870f00781tape 789827eio.js v2.5 01e0b96io.js v2.4 6be715aio.js v2.3 fc92e06io.js v3.0 ab286c0FAQs
A robust & optimized ES3-compatible polyfill for the `String.prototype.at` proposal for ECMAScript 6/7 - based on https://mths.be/at
The npm package string-at receives a total of 55,147 weekly downloads. As such, string-at popularity was classified as popular.
We found that string-at demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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