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Position an element at the center of the screen
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| HTMLElement.prototype.center = function(){ | |
| this.style.top = "50%"; | |
| this.style.left = "50%"; | |
| this.style.marginTop = -this.offsetHeight / 2 + "px"; | |
| this.style.marginLeft = -this.offsetWidth / 2 + "px"; | |
| } | |
| // document.querySelector("#myDiv").center(); | |
| // assumes position absolute or fixed |
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