mirror of https://github.com/jkjoy/sunpeiwen.git
19 lines
613 B
JavaScript
19 lines
613 B
JavaScript
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'use strict';
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var $export = require('./_export');
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var $fails = require('./_fails');
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var aNumberValue = require('./_a-number-value');
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var $toPrecision = 1.0.toPrecision;
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$export($export.P + $export.F * ($fails(function () {
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// IE7-
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return $toPrecision.call(1, undefined) !== '1';
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}) || !$fails(function () {
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// V8 ~ Android 4.3-
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$toPrecision.call({});
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})), 'Number', {
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toPrecision: function toPrecision(precision) {
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var that = aNumberValue(this, 'Number#toPrecision: incorrect invocation!');
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return precision === undefined ? $toPrecision.call(that) : $toPrecision.call(that, precision);
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}
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});
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