JavaScript slice () method
Examples
Read element in the array:
var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var citrus = fruits.slice(1,3);
var citrus = fruits.slice(1,3);
citrus output results:
Orange,Lemon
try it"
Definition and Usage
slice () method returns the selected elements from the existing array.
slice () method can extract a portion of the string and returns a new string is extracted portions.
Note: slice () method does not change the original array.
Browser Support
All major browsers support slice ().
grammar
array.slice( start , end )
Parameter Values
| 参数 | 描述 |
|---|---|
| start | 必需。规定从何处开始选取。如果是负数，那么它规定从数组尾部开始算起的位置。也就是说，-1 指最后一个元素，-2 指倒数第二个元素，以此类推。 |
| end | 可选。规定从何处结束选取。该参数是数组片断结束处的数组下标。如果没有指定该参数，那么切分的数组包含从 start 到数组结束的所有元素。如果这个参数是负数，那么它规定的是从数组尾部开始算起的元素。 |
return value
| Type | description |
|---|---|
| Array | It returns a new array that contains from start to end (not including the element) of arrayObject the elements. |
technical details
| JavaScript version: | 1.2 |
|---|
More examples
Examples
Negative values read from the array element
var fruits = ["Banana", "Orange", "Lemon", "Apple", "Mango"];
var myBest = fruits.slice(-3,-1);
var myBest = fruits.slice(-3,-1);
myBest result output:
Lemon, Apple
try it"
Examples
Interception of a string
var str = "www.w3big.com!";
document.write (str.slice (4) + "<br>"); // The first five characters from the start to the end of the interception
document.write (str.slice (4,10)); // start from the first five characters in the interception of the first 10 characters
document.write (str.slice (4) + "<br>"); // The first five characters from the start to the end of the interception
document.write (str.slice (4,10)); // start from the first five characters in the interception of the first 10 characters
try it"