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sign.js
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/
sign.js
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/*
* Copyright 2016 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'require util/polyfill';
$jscomp.polyfill('Math.sign', function(orig) {
if (orig) return orig;
/**
* Returns the sign of the number, indicating whether it is
* positive, negative, or zero.
*
* <p>Polyfills the static function Math.sign().
*
* @param {number} x Any number, or value that can be coerced to a number.
* @return {number} The sign, +1 if x is positive, -1 if x is
* negative, or 0 if x is zero.
*/
var polyfill = function(x) {
x = Number(x);
return x === 0 || isNaN(x) ? x : x > 0 ? 1 : -1;
};
return polyfill;
}, 'es6', 'es3');