linkify-it
Advanced tools
The linkify-it package is a tool for finding links such as URLs and email addresses in plain text and converting them into clickable hyperlinks. It is highly customizable and allows developers to tweak the link recognition to suit their needs.
URL Recognition
This feature allows the detection of URLs within a text string and provides details about the recognized URLs, such as the index of the match within the string.
const linkify = require('linkify-it')();
console.log(linkify.match('Visit http://example.com for more information.'));Email Recognition
With this feature, linkify-it can identify email addresses in text and treat them as mailto: links, which can be useful for creating clickable email links.
const linkify = require('linkify-it')();
linkify.add('mailto:', 'mailto:');
console.log(linkify.match('Contact us at: info@example.com'));Custom Schema
This feature allows developers to add custom schemas and protocols to be recognized by linkify-it, enabling the detection of non-standard or less common link types.
const linkify = require('linkify-it')();
linkify.add('git:', 'http:');
console.log(linkify.match('Clone the repo at git://github.com/user/repo.git'));TLD Customization
Linkify-it allows for the addition of custom top-level domains (TLDs) to its list, which can be useful for recognizing and linking to URLs with non-standard TLDs.
const linkify = require('linkify-it')();
linkify.tlds('my', true);
console.log(linkify.match('Check out this cool site: example.my'));Autolinker is a similar package that automatically converts URLs, email addresses, and Twitter handles into clickable links. It is similar to linkify-it but also includes options to truncate the length of the displayed URLs and to strip prefixes (e.g., 'http://').
url-regex is a package that provides a regular expression for matching URLs. Unlike linkify-it, url-regex does not offer the same level of customization or the ability to add new schemas or TLDs, but it is useful for simple URL matching.
Anchorme is another package that converts URLs and email addresses to clickable links. It offers features like link validation and the ability to convert links within a specific part of the text. It is comparable to linkify-it but with a different API and additional options for link validation.
Links recognition library with FULL unicode support. Focused on high quality link patterns detection in plain text.
Why it's awesome:
npm install linkify-it --save
Browserification is also supported.
import linkifyit from 'linkify-it';
const linkify = linkifyit();
// Reload full tlds list & add unofficial `.onion` domain.
linkify
.tlds(require('tlds')) // Reload with full tlds list
.tlds('onion', true) // Add unofficial `.onion` domain
.add('git:', 'http:') // Add `git:` protocol as "alias"
.add('ftp:', null) // Disable `ftp:` protocol
.set({ fuzzyIP: true }); // Enable IPs in fuzzy links (without schema)
console.log(linkify.test('Site github.com!')); // true
console.log(linkify.match('Site github.com!')); // [ {
// schema: "",
// index: 5,
// lastIndex: 15,
// raw: "github.com",
// text: "github.com",
// url: "http://github.com",
// } ]
linkify.add('@', {
validate: function (text, pos, self) {
const tail = text.slice(pos);
if (!self.re.twitter) {
self.re.twitter = new RegExp(
'^([a-zA-Z0-9_]){1,15}(?!_)(?=$|' + self.re.src_ZPCc + ')'
);
}
if (self.re.twitter.test(tail)) {
// Linkifier allows punctuation chars before prefix,
// but we additionally disable `@` ("@@mention" is invalid)
if (pos >= 2 && tail[pos - 2] === '@') {
return false;
}
return tail.match(self.re.twitter)[0].length;
}
return 0;
},
normalize: function (match) {
match.url = 'https://twitter.com/' + match.url.replace(/^@/, '');
}
});
Creates new linkifier instance with optional additional schemas.
Can be called without new keyword for convenience.
By default understands:
http(s)://... , ftp://..., mailto:... & //... linksschemas is an object, where each key/value describes protocol/rule:
: at the end, skype:
for example). linkify-it makes sure that prefix is not preceded with
alphanumeric char.RegExp (start with ^, and don't include the
link prefix itself), or a validator function which, given arguments
text, pos, and self, returns the length of a match in text
starting at index pos. pos is the index right after the link prefix.
self can be used to access the linkify object to cache data.options:
http(s):// head. Default true.false.mailto: prefix. Default true.true to terminate link with --- (if it's considered as long dash).Searches linkifiable pattern and returns true on success or false on fail.
Quick check if link MAY BE can exist. Can be used to optimize more expensive
.test() calls. Return false if link can not be found, true - if .test()
call needed to know exactly.
Similar to .test() but checks only specific protocol tail exactly at given
position. Returns length of found pattern (0 on fail).
Returns Array of found link matches or null if nothing found.
Each match has:
// for
protocol-neutral links.Checks if a match exists at the start of the string. Returns Match
(see docs for match(text)) or null if no URL is at the start.
Doesn't work with fuzzy links.
Load (or merge) new tlds list. Those are needed for fuzzy links (without schema) to avoid false positives. By default:
xn--...) root zones are ok.If that's not enough, you can reload defaults with more detailed zones list.
Add a new schema to the schemas object. As described in the constructor
definition, key is a link prefix (skype:, for example), and value
is a String to alias to another schema, or an Object with validate and
optionally normalize definitions. To disable an existing rule, use
.add(key, null).
Override default options. Missed properties will not be changed.
FAQs
Links recognition library with FULL unicode support
The npm package linkify-it receives a total of 6,456,886 weekly downloads. As such, linkify-it popularity was classified as popular.
We found that linkify-it 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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