课程: JavaScript Essential Training
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Accessing object properties
- [Instructor] Accessing an entire object is useful in some cases, but in other cases you need access to individual properties and methods within that object. There are two ways of accessing object properties, dot notation and bracket notation. Let's look at dot notation first. I want to output the value of just the pocket number property. To do that, I'll first console logout, the pocketNum value:, then I'll use dot notation by first accessing the backpack object, then adding a dot, and then adding the property I want, in this case pocket number. And you can see when I add the dot, VS Code automatically says, "Hey I see you're using dot notation. What is it you want?" And it suggests to me pocket number. Save, check it in the console, and you see now we have the full object, and then we have just a pocket number value. Dot notation is called dot notation because you literally use a dot to separate 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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