Edit fiddle - JSFiddle - React, Tailwind, and code Playground

JSFiddle - React, Tailwind, and code Playground

JavaScript

var originalString = 'qwerty   ASDFG  zxCVb';
alert('original string: ' + originalString + ' [' + originalString.length + ']');
var lowerCaseString = originalString.toLowerCase();
alert('lowercase string: ' + lowerCaseString + ' [' + lowerCaseString.length + ']');

alert( 'search index: original [' + originalString.indexOf('ASD') + '] / lowerCase [' + lowerCaseString.indexOf('asd') + ']');

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JSFiddle - React, Tailwind, and code Playground

JavaScript

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Use pre-released features

Fiddle collections

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Console