Answers for "if something append to an array javascript"

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append to array check if exists javascript

var array = ['test1','test2'];
var item = 'test2';

if(array.indexOf(item) === -1) {
    array.push(item);
}
// array = ["test1", "test2"]

if(array.indexOf(item) !== -1) {
    array.push(item);
}
// array = ["test1", "test2", "test2"]

Posted by: Guest on August-12-2021

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