检查元素是否包含JavaScript或jQuery中的三个字符串之一

Question

When DOM ready, I would like to check if an element on the page contains one of three strings. Currently, I am doing it like this, but this is not working as expected because indexOf is usually used in combination with arrays:

jQuery('li.woocommerce-order-overview__payment-method.method')[0].innerHTML.indexOf('iDEAL' || 'Sofortbanking' || 'Bancontact / MisterCash') > 1

How can I rewrite this in the most effective way to check if the element contains one of the three strings?

Answer 1

var html = ...
var match = new Array('iDEAL' , 'Sofortbanking' , 'Bancontact / MisterCash');
var found = false;
for(var i=0;i<3;++i){
    if(html.indexOf(match[i])!=-1){
        found = true;
    }
}
//use `found`

Answer 2

Here's my try on it.

 var html, salient; html = $("li.woocommerce-order-overview__payment-method.method").html(); salient = [ "iDEAL", "Sofortbanking", "Bancontact / MisterCash" ]; for (i = 0; i < salient.length; i++) { if (html.indexOf(salient[i]) !== -1) { // it contains string i } } 

Or, if you want to use a RegEx, which is not necessarily better:

 var html; html = $("li.woocommerce-order-overview__payment-method.method").html(); if (html.match(/(?:iDEAL|Sofortbanking|Bancontact.*MisterCash)/)) { // it contains one of those strings } 

Answer 3

If you want to get the Stein which is present, Use match function.

If you just want to check whether it is there or not, then use the test in JavaScript

/(iDEAL|Sofortbanking|Bancontact|MisterCash){1,}/.test(
      jQuery('li.woocommerce-order-overview__payment-method.method')[0].innerHTML);

The regular expression

/(iDEAL|Sofortbanking|Bancontact|MisterCash){1,}/

Will match 1 or more occurances of that words

Answer 4

You can use an array of needles, and then Array.some to check if the element contains any of them

let needles  = ['iDEAL', 'Sofortbanking', 'Bancontact', 'Bancontact / MisterCash'];
let haystack = $('li.woocommerce-order-overview__payment-method.method').html();
let result   = needles.some( needle => haystack.includes( needle ) );

Answer 5

The || (Or operator) does not work that way, I would suggest using the || outside of indexOf() Like so

indexOf('iDEAL') > 1 || indexOf('Sofortbanking') > 1 || indexOf('...')>1 indexOf('iDEAL') > 1 || indexOf('Sofortbanking') > 1 || indexOf('...')>1 Have a Look at a similar answer here