es.number.to-precision.js•815 B
'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);
}
});