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What does this.parentNode.parentNode (parent node of parent node) mean_HTML/Xhtml_Webpage Production
What does this.parentNode.parentNode (parent node of parent node) mean_HTML/Xhtml_Webpage Production
The parent node of the parent node, for example, there is this piece of
HTML:
In this case, this.parentNode is divB, and this.parentNode.parentNode is divA. The so-called parentNode is the node above it.
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An article that understands this point and catches up with 70% of front-end people
Sep 06, 2022 pm 05:03 PM
A colleague got stuck due to a bug pointed by this. Vue2’s this pointing problem caused an arrow function to be used, resulting in the inability to get the corresponding props. He didn't know it when I introduced it to him, and then I deliberately looked at the front-end communication group. So far, at least 70% of front-end programmers still don't understand it. Today I will share with you this link. If everything is wrong If you haven’t learned it yet, please give me a big mouth.
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This article will help you interpret the vue source code and introduce why you can use this to access properties in various options in Vue2. I hope it will be helpful to everyone!
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How to use parentnode
Sep 18, 2023 am 10:17 AM
How to use parentnode: 1. Create a sample HTML file; 2. Obtain the node object with the id "child" through the getElementById method; 3. Obtain the parent node object of the node using the parentNode attribute; 4. Output the parent node's The id is "parent".
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1. this keyword 1. Type of this: Which object is called is the reference type of that object 2. Usage summary 1. this.data;//Access attribute 2. this.func();//Access method 3.this( );//Call other constructors in this class 3. Explanation of usage 1.this.data is used in member methods. Let us see what will happen if this is not added classMyDate{publicintyear;publicintmonth;publicintday; publicvoidsetDate(intyear,intmonth,intday){ye
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Detailed explanation of this in JavaScript arrow function
Jan 25, 2024 pm 01:41 PM
The arrow function in JavaScript is a relatively new syntax. It does not have its own this keyword. On the contrary, the this of the arrow function points to the scope object containing it. The impacts are: 1. This in the arrow function is static; 2. Arrow Functions cannot be used as constructors; 3. Arrow functions cannot be used as methods.
