Spread operation in function calls No support 46 27.0 (27) No support No support 8 46 Spread operation in destructuring No support No support 34 (34) ? ? ? No support See also Rest parameters Document Tags and Contributors Tags: ECMAScript6 Iterator JavaScript operator Operator Contributors ...
Opera ❌ 10 - 46: Not supported ✅ 47 - 116: Supported ✅ 117: Supported Safari on iOS ❌ 3.2 - 11.2: Not supported ✅ 11.3 - 18.4: Supported ✅ 18.5: Supported Opera Mini ﹖all: Support unknown Android Browser ❌ 2.1 - 4.4.4: Not supported ✅ 136: Supported Opera Mobi...
Since spread operator states to consider any after three dots as array if it fits the construct. so {...false} does almost what happens to b in below example. It remains an empty object WHY because objects need key value paring. a = [1,2,3]; b={1,2,3}; console.log(a[1]); ...
JavaScript operator: Spread syntax (...) Global usage 95.23% + 0% = 95.23% IE ❌ 6 - 10: Not supported ❌ 11: Not supported Edge ✅ 12 - 135: Supported ✅ 136: Supported Firefox ❌ 2 - 15: Not supported ✅ 16 - 137: Supported ✅ 138: Supported ✅ 139 - 141: ...
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When merging 2 objects together with the spread operator, it is assumed another iterating function is used when the merging occurs.Spread syntax (other than in the case of spread properties) can be applied only to iterable objects:const obj = {'key1': 'value1'}; const array = [...obj...
还有一种操作符叫做剩余操作符(the rest operator),它的样子看起来和展开操作符一样,但是它是用于解构数组和对象。在某种程度上,剩余元素和展开元素相反,展开元素会“展开”数组变成多个元素,剩余元素会收集多个元素和“压缩”成一个单一的元素。 规范 规范状态备注 ...