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- What does push mean in js
- In JavaScript, the push() method is used to add an element to the end of an array and return the modified array length. Specifically: modify the original array and add new elements to the end. Receives any number of new elements as arguments. Returns the new array length, containing the number of newly added elements. Supports nested arrays, adding other arrays as single elements. No error will be reported because the array is full, but the array size will be dynamically expanded.
- JS Tutorial 927 2024-05-06 11:48:16
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- What does colspan mean in js
- colspan is a table element attribute in HTML that specifies the number of columns that a cell spans. By using the colspan attribute, you can combine cells into wider columns, improving table readability, maintainability, and creating a more flexible layout.
- JS Tutorial 294 2024-05-06 11:45:23
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- What does span mean in js
- The span tag can add styles, attributes, or behaviors to text. It is used to: add styles, such as color and font size. Set attributes such as id, class, etc. Associated behaviors such as clicks, hovers, etc. Mark text for further processing or citation.
- JS Tutorial 502 2024-05-06 11:42:16
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- How to sort input letters in js
- In JavaScript, alphabets can be sorted using the sort() method: by default, they are sorted by ASCII code value (lowercase letters first). By providing a custom comparison function, it is possible to sort according to custom rules (for example: case-insensitive).
- JS Tutorial 643 2024-05-06 11:39:17
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- The role of join method in js
- The join() method in JavaScript is used to concatenate array elements into a string, separated by the specified connector (comma by default), and return the concatenated string.
- JS Tutorial 886 2024-05-06 11:36:14
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- What does resolve mean in js
- resolve is a method of the JavaScript Promise object that is used to attach a handler after an asynchronous operation completes successfully. How to use: promise.resolve(value) Pass the success value to the Promise object. When you use resolve to pass a value to a Promise, you can attach a then() handler to handle the successful outcome of the Promise.
- JS Tutorial 543 2024-05-06 11:33:14
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- What does rem mean in js
- REM in CSS is a relative unit relative to the font size of the root element (html). It has the following characteristics: relative to the root element font size, not affected by the parent element. When the root element's font size changes, elements using REM will adjust accordingly. Can be used with any CSS property. Advantages of using REM include: Responsiveness: Keep text readable on different devices and screen sizes. Consistency: Make sure font sizes are consistent throughout your website. Scalability: Easily change the global font size by adjusting the root element font size.
- JS Tutorial 421 2024-05-06 11:30:25
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- What does required mean in js
- The required attribute in JavaScript is used to specify whether a script must be loaded before other scripts can run. Its main uses include loading scripts on demand, dependency management, and browser compatibility management. If a script with the required attribute fails to load, the browser in standards mode will stop loading the page, while in compatibility mode the browser will continue to load the page, but the required functionality may not be available.
- JS Tutorial 642 2024-05-06 11:27:14
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- How to convert string to array in js
- In JavaScript, you can convert a string into an array using the spread operator to extract each element; direct conversion using the Array.from() method; split by delimiter using the split() method; and match() method by Regular expression to match alphabetic words.
- JS Tutorial 335 2024-05-06 11:24:16
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- How to use splite in js
- The split() method splits a string into a string array according to the specified delimiter. Usage: str.split(separator, limit), separator is the separator, and limit is the maximum length of the returned array.
- JS Tutorial 757 2024-05-06 11:21:14
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- How to use split() function in js
- The JavaScript split() function splits a string into an array using the specified delimiter. It accepts two parameters: delimiter and limit number of results (optional). Returns an array containing split elements. Usage scenarios include splitting strings by spaces, characters, or regular expressions, and controlling the number of split results.
- JS Tutorial 678 2024-05-06 11:15:24
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- How to use split function in js
- The split() function splits a string into an array using the specified delimiter. Usage: result = string.split(separator, limit), where separator is the separator and limit is the optional limit on the number of elements (no limit by default). Returns an array containing substrings, delimited by characters, regular expressions, or strings. If delimiter is empty, each character becomes an element. If the delimiter is not in the string, returns a single-element array containing the entire string. limit controls the number of elements in the returned array.
- JS Tutorial 785 2024-05-06 11:12:16
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- What is the traversal method of array in js
- Array traversal methods in JavaScript include: forEach(): Execute the specified function on each element. map(): Creates a new array containing the results of applying the specified function. filter(): Creates a new array containing elements that meet the specified conditions. find(): Returns the first element that meets the specified conditions. findIndex(): Returns the index of the first element that meets the specified condition. some(): Checks whether there is at least one element that meets the specified condition. every(): Checks whether all elements meet the specified conditions. reduce(): Reduce the array to a cumulative value.
- JS Tutorial 475 2024-05-06 11:09:20
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- What are the traversal methods of arrays in js
- There are many ways to traverse arrays in JavaScript: for loop forEach() method map() method filter() method find() method findIndex() method every() method some() method reduce() method
- JS Tutorial 513 2024-05-06 11:06:17
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- How to use static methods to create instances of classes in js
- In JavaScript, you can use static methods to create instances without first creating a class instance. The syntax of the static method is: ClassName. Static method name (parameter), such as Person.createInstance("John", 30). Benefits include convenience, modularity and performance. Static methods can also be used to access class-level information, provide utility functionality, validate input, and perform common tasks.
- JS Tutorial 647 2024-05-06 11:00:24
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