CODEWITHSUNDEEP
jquerycontains
herrfischer
herrfischer

Reputation: 1828

jQuery - Check if input field contains one of the words

I want to check on click if the input field #plz-input contains one of the two words: "red" or "green".

I tried .contains() but it does only work with the first word.

$('#submit').click(function() {
    if( $("#plz-input").contains('red green')) {
        alert("Wrong Value ...");
    } else {
        alert("Right Value!");
    }
    return false;
});

Upvotes: 0

Views: 2071

Answers (1)

Rion Williams
Rion Williams

Reputation: 76547

Consider a Regular Expression

You could easily accomplish this with a simple regular expression via the RegExp.test() function. Just separate your your individual terms with a pipe as seen below :

var colors = new RegExp('red|green|purple|...');

Then just call the test() function, which will indicate if any of those terms are found within your string as seen below:

// Define an expression of words to check for
var colors = new RegExp('red|green');
// Check if any of the words is contained within your element
if(colors.test($('#plz-input').val()){
   alert('Wrong Value ...');
} else {
   alert('Right Value!');
}

Example

<input id='colors' onkeyup='checkForColors(this);' /> <span id='result'></span>
<script>
    var result = document.querySelector('#result');
    function checkForColors(element){
        var colors = new RegExp('red|green');
        result.innerText = colors.test(element.value) ? 'Incorrect!' : 'Correct!';
    }
</script>

Upvotes: 3

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