CODEWITHSUNDEEP
javascriptalert
David
David

Reputation: 11

How to trigger code if a specific word is present on a webpage

I am extremely new to coding (more specifically javascript) and only really know the very basics. I was wondering if there was an easy way to perhaps give an alert when a certain word or words are displayed on a webpage, for example if i was in an online chat room and someone wrote "noot noot" i could then get an alert.

Upvotes: 0

Views: 550

Answers (1)

Shakti Phartiyal
Shakti Phartiyal

Reputation: 6254

To search for a specific word in given area you can use the JS function search() which returns a value which being greater than 0 means it exists.

If you want to search the whole body of the webpage for example you can use:

document.getElementsByTagName('body')[0].innerHTML.search("W3Schools");

Or of a specific div with id output then you can use:

document.getElementById('output').innerHTML.search("W3Schools");

See the example below:

var exists = document.getElementById('output').innerHTML.search("root");
if(exists > 0)
{
  alert("root exissts");
}
else
{
  alert("root does not exist");
}
<div id="output">
<p>Hello I am root</p><br/>
<span>this is the root</span>

</div>

Upvotes: 1

Related Questions