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December 9, 2016 08:00
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window.scrollMaxX, window.scrollMaxY polyfill, add scrollMaxX, scrollMaxY to HTMLElement.
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| // window.scrollMaxX, window.scrollMaxY polyfill | |
| 'scrollMaxX' in window || Object.defineProperties(window, { | |
| scrollMaxX: { | |
| enumerable: true, | |
| get: function(){ | |
| return document.documentElement.scrollWidth - document.documentElement.clientWidth; | |
| }, | |
| }, | |
| scrollMaxY: { | |
| enumerable: true, | |
| get: function(){ | |
| return document.documentElement.scrollHeight - document.documentElement.clientHeight; | |
| }, | |
| } | |
| }); | |
| // add scrollMaxX, scrollMaxY to HTMLElement | |
| 'scrollMaxX' in HTMLElement || Object.defineProperties(HTMLElement.prototype, { | |
| scrollMaxX: { | |
| enumerable: true, | |
| get: function(){ | |
| return this.scrollWidth - this.clientWidth; | |
| }, | |
| }, | |
| scrollMaxY: { | |
| enumerable: true, | |
| get: function(){ | |
| return this.scrollHeight - this.clientHeight; | |
| }, | |
| } | |
| }); |
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demo
http://jsdo.it/ksk1015/ElDs