课程: JavaScript Essential Training
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Object constructors
- [Instructor] While classes are the preferred tool for creating object templates, there is another shorter and less advanced way of doing the same thing, which relies on a basic function. It's called an object constructor function and you can see an example of it in the exercise files for this movie. Just like with the class, the object constructor uses a capitalized name to let us know this is a constructor function that produces new objects. The object constructor function captures the properties of the new object using its parameters and then defines and assigns values for each property and method using the this keyword and dot notation. So here we have this name and it's populated with the value from the name parameter that's passed to the function. You'll notice that the difference between the class and the object constructor function here is the methods live inside the main construction function, just like the…
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内容
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Objects: A practical introduction4 分钟 53 秒
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JavaScript objects: The code version2 分钟 57 秒
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Object containers2 分钟 22 秒
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Object properties55 秒
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Accessing objects2 分钟 32 秒
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Accessing object properties5 分钟 35 秒
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Practice: Build a new object1 分钟 18 秒
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Object methods6 分钟 29 秒
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Practice: Build a new method56 秒
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Classes: Object blueprints6 分钟 35 秒
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Object constructors2 分钟 21 秒
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Practice: Build a new object with a constructor1 分钟 13 秒
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Global objects7 分钟 47 秒
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Challenge intro: Create a new object type2 分钟 5 秒
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Solution: Create a new object type3 分钟 16 秒
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