The three dots (...) in Vue represent the spread operator, which is used to: expand arrays and merge multiple array elements into a new array. Expand objects to combine the properties and values of multiple objects into a new object. Expand function parameters to receive an indefinite number of parameters.
The meaning of three dots (...) in Vue
In Vue, three dots ( ...) represents the expansion operator, which has the following effects:
Expand array
<code>const arr1 = [1, 2, 3]; const arr2 = [4, 5]; const combinedArr = [...arr1, ...arr2]; // [1, 2, 3, 4, 5]</code>
Expand object
<code>const obj1 = { name: 'John', age: 30 }; const obj2 = { city: 'New York' }; const combinedObj = { ...obj1, ...obj2 }; // { name: 'John', age: 30, city: 'New York' }</code>
Expand function parameters
<code>const sum = (...numbers) => { let total = 0; for (const number of numbers) { total += number; } return total; }; console.log(sum(1, 2, 3, 4, 5)); // 15</code>
Other uses
enables fast cloning.
to filter elements in an expanded manner.
It should be noted that:
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