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22 lines
839 B
JavaScript
22 lines
839 B
JavaScript
/**
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* String.prototype.padStart() polyfill
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* https://github.com/uxitten/polyfill/blob/master/string.polyfill.js
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* https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
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*/
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if (!String.prototype.padStart) {
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String.prototype.padStart = function padStart(targetLength,padString) {
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targetLength = targetLength>>0; //truncate if number or convert non-number to 0;
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padString = String((typeof padString !== 'undefined' ? padString : ' '));
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if (this.length > targetLength) {
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return String(this);
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}
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else {
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targetLength = targetLength-this.length;
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if (targetLength > padString.length) {
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padString += padString.repeat(targetLength/padString.length); //append to original to ensure we are longer than needed
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}
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return padString.slice(0,targetLength) + String(this);
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}
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};
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}
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