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December 2, 2019 21:24
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Redux Tutorial Video 10 // source https://jsbin.com/carezix
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="description" content="Video 10"> | |
| <meta charset="utf-8"> | |
| <title>Redux Tutorial</title> | |
| <script src="https://wzrd.in/standalone/expect@latest"></script> | |
| <script src="https://wzrd.in/standalone/deep-freeze@latest"></script> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| const toggleTodo = (todo) => { | |
| //ANTIPATTERN: Mutation | |
| //todo.completed = !todo.completed; | |
| //return todo; | |
| // This works, but is hard to maintain | |
| //return { | |
| // id: todo.id, | |
| // text: todo.text, | |
| // completed: !todo.completed | |
| //} | |
| // let's use Object.assign! | |
| } | |
| const testToggleTodo = () => { | |
| const todoBefore = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| } | |
| const todoAfter = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: true | |
| } | |
| deepFreeze(todoBefore); | |
| expect( | |
| toggleTodo(todoBefore) | |
| ).toEqual(todoAfter) | |
| } | |
| testToggleTodo() | |
| console.log('Everything shipshape!') | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">const toggleTodo = (todo) => { | |
| //ANTIPATTERN: Mutation | |
| //todo.completed = !todo.completed; | |
| //return todo; | |
| // This works, but is hard to maintain | |
| //return { | |
| // id: todo.id, | |
| // text: todo.text, | |
| // completed: !todo.completed | |
| //} | |
| // let's use Object.assign! | |
| } | |
| const testToggleTodo = () => { | |
| const todoBefore = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| } | |
| const todoAfter = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: true | |
| } | |
| deepFreeze(todoBefore); | |
| expect( | |
| toggleTodo(todoBefore) | |
| ).toEqual(todoAfter) | |
| } | |
| testToggleTodo() | |
| console.log('Everything shipshape!')</script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| const toggleTodo = (todo) => { | |
| //ANTIPATTERN: Mutation | |
| //todo.completed = !todo.completed; | |
| //return todo; | |
| // This works, but is hard to maintain | |
| //return { | |
| // id: todo.id, | |
| // text: todo.text, | |
| // completed: !todo.completed | |
| //} | |
| // let's use Object.assign! | |
| } | |
| const testToggleTodo = () => { | |
| const todoBefore = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: false | |
| } | |
| const todoAfter = { | |
| id: 0, | |
| text: 'Learn Redux', | |
| completed: true | |
| } | |
| deepFreeze(todoBefore); | |
| expect( | |
| toggleTodo(todoBefore) | |
| ).toEqual(todoAfter) | |
| } | |
| testToggleTodo() | |
| console.log('Everything shipshape!') |
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