Javascript
简写
- user.name ?? 'default'
- user?.address?.city
- arr => [...new Set(arr)]
- ~~4.9
- { ...obj1, ...obj2 }
- (name='default') => { console.log(
hello ${name})} - const [ var1, var2 ] = arr
- name = +'123'
- [ 1, 2, 3 ].includes(var) && console.log('match')
- 2 ** 3
- { attr1, attr2 }
- arr.map(num => num * 2)
- [ var1, var2 ] = [ var2, var1 ]
- {
${var}name: val }