Created
October 19, 2023 14:57
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The Worlds Smallest UI Binding Library
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Home</title> | |
| <script type="module"> | |
| function someClick() { | |
| alert("hello"); | |
| } | |
| const anything = { | |
| foo: 'bar', | |
| title: "google", | |
| url: "https://www.google.com", | |
| baz: { | |
| qux: 'quux' | |
| }, | |
| items: [ | |
| { foo: "barry" } | |
| ] | |
| }; | |
| renderTemplate("main", "someTemplate", anything); | |
| function renderTemplate(targetId, templateId, data = null) { | |
| const template = document.getElementById(templateId); | |
| const clone = template.content.cloneNode(true); | |
| const elements = clone.querySelectorAll("*"); | |
| elements.forEach(ele => { | |
| const bindingAttrs = [...ele.attributes].filter(a => a.name.startsWith("data-bind")); | |
| bindingAttrs.forEach(attr => { | |
| const target = attr.name.replace(/data-bind-/, "").replace(/data-bind/, ""); | |
| const targetType = target.startsWith("on") ? "HANDLER" : "PROPERTY"; | |
| const targetProp = target === "" ? "innerHTML" : target; | |
| const prefix = targetType === "PROPERTY" ? "data." : ""; | |
| const expression = prefix + attr.value.replace(/;\n\r\n/g, ""); | |
| // Maybe use a framework with more validation here ;) | |
| ele[targetProp] = targetType === "PROPERTY" ? eval(expression) : () => { eval(expression) }; | |
| ele.removeAttribute(attr.name); | |
| }); | |
| }); | |
| const target = document.getElementById(targetId); | |
| target.innerHTML = ""; | |
| target.appendChild(clone); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <div id="main"> | |
| </div> | |
| <template id="someTemplate"> | |
| <h1>Hello world</h1> | |
| <div data-bind="foo" data-bind-onclick="someClick();"></div> | |
| <div> | |
| Nested: <span data-bind="baz.qux"></span> | |
| </div> | |
| <div data-bind="items[0].foo"></div> | |
| <a data-bind-href="url" data-bind="title"></a> | |
| </template> | |
| </body> | |
| </html> |
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