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Aurelia OnKeyBindingBehavior (`keyup.delegate="eventHandler(message) & onKey:'enter'"`)
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| <template> | |
| <require from="./on-key"></require> | |
| Press enter in textbox to trigger event: | |
| <input | |
| value.bind="message" | |
| keyup.delegate="textEntered() & onKey:'enter'" | |
| /> | |
| ${message} | |
| </template> |
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| export class App { | |
| message = 'Hello World!'; | |
| textEntered() { | |
| alert(this.message); | |
| } | |
| } |
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title>Aurelia</title> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| </head> | |
| <body aurelia-app> | |
| <h1>Loading...</h1> | |
| <script src="https://jdanyow.github.io/rjs-bundle/node_modules/requirejs/require.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/config.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/bundles/aurelia.js"></script> | |
| <script src="https://jdanyow.github.io/rjs-bundle/bundles/babel.js"></script> | |
| <script> | |
| require(['aurelia-bootstrapper']); | |
| </script> | |
| </body> | |
| </html> |
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| export class OnKeyBindingBehavior { | |
| bind(binding, scope, ...keyCodesOrAliases) { | |
| var keyCodeAliases = this.getKeyCodeAliases(); | |
| if(keyCodesOrAliases.length === 0) { | |
| throw new Error("Expected at least one key-code or alias that shold trigger the event"); | |
| } | |
| var keyCodes = keyCodesOrAliases.map(keyCodeOrAlias => { | |
| if(typeof(keyCodeOrAlias) === "string") { | |
| keyCodeOrAlias = keyCodeOrAlias.toLowerCase(); | |
| } | |
| var keyCodeAlias = keyCodeAliases[keyCodeOrAlias]; | |
| return keyCodeAlias ? keyCodeAlias : keyCodeOrAlias | |
| }); | |
| binding.keyCodeFilteredCallSource = binding.callSource; | |
| binding.callSource = function(event) { | |
| if (keyCodes.indexOf(event.keyCode) !== -1) { | |
| this.keyCodeFilteredCallSource(event); | |
| } | |
| } | |
| } | |
| unbind(binding, scope) { | |
| binding.callSource = binding.keyCodeFilteredCallSource; | |
| binding.keyCodeFilteredCallSource = null; | |
| } | |
| // could create a subclass to use custom aliases | |
| getKeyCodeAliases() { | |
| return { | |
| "enter": 13, | |
| "esc": 27, | |
| // perhaps some more commonly used key bindings | |
| }; | |
| } | |
| } |
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