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- 'use strict';
- var $ = require('../internals/export');
- var uncurryThis = require('../internals/function-uncurry-this');
- var fails = require('../internals/fails');
- var thisNumberValue = require('../internals/this-number-value');
-
- var nativeToPrecision = uncurryThis(1.0.toPrecision);
-
- var FORCED = fails(function () {
- // IE7-
- return nativeToPrecision(1, undefined) !== '1';
- }) || !fails(function () {
- // V8 ~ Android 4.3-
- nativeToPrecision({});
- });
-
- // `Number.prototype.toPrecision` method
- // https://tc39.es/ecma262/#sec-number.prototype.toprecision
- $({ target: 'Number', proto: true, forced: FORCED }, {
- toPrecision: function toPrecision(precision) {
- return precision === undefined
- ? nativeToPrecision(thisNumberValue(this))
- : nativeToPrecision(thisNumberValue(this), precision);
- }
- });
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