JS function package foreach use return can not jump out of the outer function

stay forEach Use in return It will only jump out of this cycle

    let a = 1, b = 1
    let c = 2, d = 2
    let e = 3, f = 3
    let list = [1, 2, 3, 4, 5, 6, 7]
   

    function foo() {
    
      if (a === b) {
    
        list.forEach(item => {
    
          if (item === 3) {
    
            console.log(333333333)
            return
          }
        })
        //forEach Medium return Come out here and continue 
        if (e === f) {
    
          console.log('e === f')
          return
        }
      }
    }

Output 333333333 and e === f
Solution 1 , use for Instead of forEach
Solution 2 , use flag Judge , The need to return Where to modify flag Value , Use in affected areas flag Decide whether to execute

    function foo() {
    
      let flag = true
      if (a === b) {
    
        list.forEach(item => {
    
          if(item === 3){
    
            console.log(333333333)
            flag = false
            return
          }
        })
        if (e === f && flag) {
    
          console.log('e === f')
          return
        }
      }
    }

Only the output 333333333

forEach It's a function itself , Perform the given function once for each element of the array . The array has several elements , Just execute the function several times . therefore forEach Medium return It will only jump out of this circular function , and for Loop is to jump out of all loops

	function foo(){
    
        list.forEach(item => {
    
          if(item === 3){
    
            console.log(333333333)
            flag = false
            return
          }
          // newly added 
          console.log(111111)// This will output 6 Time ,List The length is 7, Get rid of item by 3 That time .
        })
        console.log(' Out of the loop , Within the function ')// perform 
      }

	function foo(){
    
        for (let i = 0; i < list.length; i++) {
    
          if (list[i] === 3) {
    
            console.log(333333333)
            return
          }
          console.log(0) // Only output 2 Time , yes list[i] by 1,2 Two times 
        }
        console.log(' Out of the loop , Within the function ')// Don't execute 
    }