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Simple javascript scale content
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| "use strict"; | |
| class ScaleContent { | |
| /** | |
| * @param component => div | |
| * @param resize => allow / disable resize scale listener | |
| * @param width => original width | |
| * @param height => original height | |
| */ | |
| constructor(component, resize = true, width = null, height = null) { | |
| this.component = document.querySelector(component); | |
| this.originalWidth = width ? width : 1920; | |
| this.originalHeight = height ? height : 1080; | |
| this.zoomScale = 1; | |
| this.component.style.width = `${this.originalWidth}px`; | |
| this.component.style.height = `${this.originalHeight}px`; | |
| this.component.style.position = 'absolute'; | |
| this.component.style.overflow = 'hidden'; | |
| this.component.style.top = '50%'; | |
| this.component.style.left = '50%'; | |
| this.component.style.transform = 'translate(-50%, -50%)'; | |
| document.addEventListener('DOMContentLoaded', (event) => { | |
| this.scale(); | |
| }) | |
| if (resize) this.resize(); | |
| } | |
| scale() { | |
| let windowWidth = window.innerWidth; | |
| let windowHeight = window.innerHeight; | |
| let cof = this.originalWidth / this.originalHeight; | |
| let curCof = windowWidth / windowHeight; | |
| if (curCof > cof) { | |
| this.zoomScale = (windowHeight / this.originalHeight); | |
| } else { | |
| this.zoomScale = (windowWidth / this.originalWidth); | |
| } | |
| this.component.style.transform = "translate(-50%, -50%) scale(" + this.zoomScale + ")"; | |
| this.component.dataset.zoom = this.zoomScale; | |
| } | |
| resize() { | |
| window.addEventListener('resize', (event) => { | |
| this.scale(); | |
| }); | |
| } | |
| } |
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| // Usage | |
| new ScaleContent('.my-crazy-div'); // default resize true, and original width and height fullHD | |
| // More inputs | |
| new ScaleContent('.div', false, 600, 900); // div, resize true/false, original design width, original design height |
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