Browser - Javascript

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javascript script in the browser

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Management

Execution

Javascript code can be executed

Script

via the script html tag

Eval function

• via the eval function that evaluates a string as javascript
  • https://api.jquery.com/jQuery.globalEval/
  • Code

function globalEval( data ) {
	if ( data && jQuery.trim( data ) ) {

		// We use execScript on Internet Explorer
		// We use an anonymous function so that context is window
		// rather than jQuery in Firefox
		( window.execScript || function( data ) {
			window[ "eval" ].call( window, data );
		} )( data );
	}
}

On Attribute

• via the on… attribute of HTML element that handle the events

<button class="btn btn-info" onclick="console.log('1+1='+(1+1))" >1+1= ... </button>

For example, the following document fragment:

Asynchronous load and execution

• a Jquery with Ajax - Load and execute a JavaScript file.

$.ajax({
  method: "GET",
  url: "test.js",
  dataType: "script"
});