markjs.io

What It Is

mark.js is a JavaScript text-highlighting library designed to dynamically mark search terms, custom regular expressions, or specific character ranges in the DOM of a web page. It can be used with plain JavaScript or as a jQuery plugin, making it suitable for search result highlighting, article keyword annotation, table column highlighting, list filtering, and matching search bar navigation results.

Core Capabilities

Functionally, mark.js is more than just a simple wrapper around the <mark> tag. It provides four core APIs: mark(), markRegExp(), markRanges(), and unmark(), covering keyword highlighting, regular expression matching, range-based marking, and removing highlights respectively. Its matching options are very granular, including diacritics matching, synonyms, case sensitivity, wildcards, ignored punctuation, excluded selectors, across-element matching, iframe support, and custom filter callbacks. Developers can also specify the wrapping element and class, then control the appearance via CSS.

Integration, Ecosystem, and Documentation

Integration is relatively straightforward: it can be installed via npm or Bower, downloaded manually, or loaded from cdnjs or jsdelivr. Build files are available for ES5, ES6, minified versions, and the jQuery plugin version, with support for AMD/RequireJS and CommonJS. In terms of ecosystem, the main documentation mentions a DataTables plugin and a tablesorter widget. The documentation quality is strong, with API parameters covering types, default values, examples, and tutorials, as well as explanations for advanced options such as accuracy, synonyms, and across-element matching.

Pricing and Open Source

The main text does not list any commercial pricing. The library can be downloaded directly or used via a CDN. The page also mentions GitHub issues, pull requests, and contribution guidelines, suggesting an open-source collaboration model, although the specific license name is not explicitly stated in the text.

Pros, Cons, and Who It’s For

Its strengths are a focused feature set, detailed configuration options, and broad browser compatibility, with explicit test coverage for Firefox, Chrome, Safari, Edge, and IE9+. The downside is that it only handles frontend highlighting and does not provide search indexing, ranking, or backend retrieval. Its asynchronous execution also means the done callback should be used in more complex workflows. It is well suited to frontend engineers, documentation sites, content sites, admin dashboards, and table search scenarios.

Access in China

The main text does not provide information about availability, mirrors, or payment options for mainland China. If CDN access is unstable, it is recommended to install via npm and self-host the static files. Alternatives include the native DOM Range/Selection API, a custom DOM traversal-based highlighter, or the built-in highlighting capabilities of specific search or table components.