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2-Way-DataBinding-JS
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| "use strict"; | |
| let scope = {}; | |
| (function twoWayDataBinding() { | |
| let bindingItems = document.querySelectorAll('[tw-binding]'); | |
| // loop through all bindable elements | |
| bindingItems.forEach((e) => { | |
| if (e.type == "text") { | |
| let propToBind = e.getAttribute("tw-binding"); | |
| addScope(propToBind); | |
| e.onkeyup = function () { | |
| scope[propToBind] = e.value; | |
| } | |
| } | |
| }); | |
| // add to scope object new property if needed | |
| function addScope(propToBind){ | |
| if(!scope.hasOwnProperty(propToBind)){ | |
| let value; | |
| Object.defineProperty(scope, propToBind, { | |
| get() { return value;}, | |
| set(newValue){ | |
| value = newValue; | |
| bindingItems.forEach( (item) => { | |
| if( item.getAttribute("tw-binding") == propToBind){ | |
| if(item.type === "text"){ | |
| item.value = newValue | |
| } else if(!item.type) item.innerHTML = newValue; | |
| } | |
| }) | |
| } | |
| }) | |
| } | |
| }; | |
| })(); |
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| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| Name: <input tw-binding="name" type="text"> | |
| <input tw-binding="name" type="text"> | |
| <hr /> | |
| Age: <input tw-binding="age" type="text"> | |
| <input tw-binding="age" type="text"> | |
| <p tw-binding="age"></p> | |
| <!-- Script --> | |
| <script src="index.js"></script> | |
| </body> | |
| </html> |
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