Working to a JS script, I wanted to add a pause in the execution of the script.
In PHP there is a function sleep() to delay execution of the PHP script, but JavaScript doesn't have such a function.
Looking on the net, I found a solution to delay the execution of some code in JS script, by using the setTimeout() function.

Here's the method, the code that must be executed after pause must be inside a function that will be accessed with setTimeout():

setTimeout( function(){
 // here add the code (or call a function) to be executed after pause
}, 1000 );
- 1000 represents the number of millisecond of the pause (for 2 seconds add 2000).

Example, executing a JS code after a specified time

The following script it writes a text in page (with document.write), then, after a pause of 2.3 seconds it will display an alert dialog window.

//executes some code after a 'pause' (in millisecond)
function testPause(pause){
 setTimeout(()=>{
 // code that must be executed after the pause
 alert('Hi, I came after 2.3 seconds');
 }, pause );
}

document.write('Hi there, wait');

testPause(2300);
Here is another example that adds a 'Loading ...' message into an HTML element, than, after 2.5 seconds it adds another content.
<div id='cnt'> </div>

<script>
function simLoad(id){
 // display 'Loading ..', and use setTimeout() to access a function after 2.3 seconds
 document.getElementById(id).innerHTML = '<h4>Loading ...</h4>';

 setTimeout(()=>{ adContent(id); }, 2500);

 /* in this case setTimeout() can be used also like this
 setTimeout('adContent(''+id+'')', 2500);
 */
}

// this function adds a content inside a HTML element, with the ID passed in parameter
function adContent(id){
 document.getElementById(id).innerHTML ='JavaScript Tutorial - <em>Pause the script in JS</em> - <a href='//coursesweb.net/javascript' title='JavaScript Course'>JavaScript Course</a>';
}

simLoad('cnt'); // access simLoad() with the ID of HTML tag
</script>

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which HTML5 tag defines marked text? (can be used to highlight parts of text)
<mark> <embed> <span>
<p>Free corses: <mark>coursesweb.net</mark> for Web Development.</p>
Which CSS pseudo-class adds a style to an element when the mouse is over it?
:focus :hover :active
a:hover {
  font-weight: bold;
  color: #00da01;
}
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toPrecision(x) toFixed(x) floor(x)
var num = 12.34567;
num = num.toFixed(2);
alert(num);       // 12.35
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[) file() readfile()
$arr = file("a_file.txt", FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
var_export($arr);
Add Pause in JavaScript script

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