Registers a function to execute when DOM is ready (or immediately if already ready).

Parameters:

Throws:

Examples:

// If the JavaScript file (containing InDom) is loaded and executed before the HTML DOM 
// content is fully parsed, attempting to select elements immediately might fail because 
// they don't exist yet. Additionally, adding event listeners to elements that haven't 
// been parsed yet will also fail. Use the InDom.onReady() function to ensure your code 
// runs only after the DOM is fully loaded and ready.

InDom.onReady(() => {
    // Safe to use InDom for querying DOM elements and attach event listeners here
    $1('.example').addClass('on');
});