Xiaomi front-end interview questions

1. The following are not part of the document object method:
   onload ajax
   is the document object method
   querySelectorAll children
2. The following expression is not true:
   [1,2,3].splice(1,1,1)==[2]
   '1' ===true The
   true expression is:
   null == undefined Object .prototype

let Mi =newFunction();
Mi.__proto__.__proto__==Object.prototype

3. The functions of Image and iframe support cross-domain
   Local by default. Storage and canvas do not support cross-domain by default

4. Expression of relational data model: It
   can support the connection between the three entities of 1:1, 1:m, m:n

5. The following description of closures is correct:
   Variables in closures will not be cleared after execution
   (Function(){})() is theoretically a closure

6. What is incorrect about closures is:
   closures do not satisfy the chain scope structure,
   closures do not consume memory and can be used at any time