How can I search for a particular string in JavaScript?

Question

How can I search for a particular string in JavaScript?

I have a unique custom div that has been modified to function as an input element. Inside this custom div input element, there is a <p> tag with a default placeholder text. My goal is to verify whether the content of this div is empty or contains new text, similar to checking for a required property in a standard input element.

Upon submitting the form, I require JavaScript to validate whether the custom div element contains the default placeholder text or if it has been edited with new content.

This is the code I am currently using:

var data = $('#divtext').html();
if(data == '<p>Default place holder</p>')
{
     console.log('empty');
}
else
{
     console.log('notempty');
}

Despite submitting the div without any text, I always receive the 'notempty' response. I am puzzled by this behavior - can anyone assist me in understanding why?

javascript jquery html css

Answer 1

Answer №1

It appears that your selector is not accurately targeted.

Ensure you have an element identified by the id 'divtest'. If so, you should use the following code:

var contents = $("#divtext").html();

Answer 2

It appears that your selector is not accurately targeted.

Ensure you have an element identified by the id 'divtest'. If so, you should use the following code:

var contents = $("#divtext").html();

Answer 3

Answer №2

Your issue is simply due to an incorrect selector. To select classes, use:

var data = $('.divtext').html();

For ids, use:

var data = $('#divtext').html();

Additionally, when checking for content, avoid string comparison and instead search for a specific keyword like "Default". Here's how you can do it:

var $data = $('#divtext p').html(); // retrieve the html of the <p> tag inside the div.
if ($data && $data.trim().toLowerCase().indexOf('default') === 0) {
    console.log('empty');
} else {
    console.log('notempty');
}

This approach increases the likelihood of finding the desired content by preventing issues with whitespace and casing.

Answer 4

Your issue is simply due to an incorrect selector. To select classes, use:

var data = $('.divtext').html();

For ids, use:

var data = $('#divtext').html();

Additionally, when checking for content, avoid string comparison and instead search for a specific keyword like "Default". Here's how you can do it:

var $data = $('#divtext p').html(); // retrieve the html of the <p> tag inside the div.
if ($data && $data.trim().toLowerCase().indexOf('default') === 0) {
    console.log('empty');
} else {
    console.log('notempty');
}

This approach increases the likelihood of finding the desired content by preventing issues with whitespace and casing.

Answer 5

Answer №3

Make sure to specify a selector in your code,

For example, to target a div with the class name "divtext":

var data = $('.divtext').html();

Or if you are targeting a div by its id:

var data = $('#divtext').html();

Answer 6

Make sure to specify a selector in your code,

For example, to target a div with the class name "divtext":

var data = $('.divtext').html();

Or if you are targeting a div by its id:

var data = $('#divtext').html();

How can I search for a particular string in JavaScript?

Answer №1

Answer №2

Answer №3

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