<pre class="shiki github-dark shaku"><code>/** * @param {HTMLElement} el - element to be wrapped */function $(el) { return { css: function (propertyName, propertyValue) { // function keyword is important to preserve this el["style"][propertyName] = propertyValue; return this; // this enables chaining } }}</code></pre>

Functional programming solutions

I believe you've used jQuery before, we often chain the jQuery methods together to accomplish our goals. For example, below chained call turns button …