index.js
import a from"@ / views/apidocument/test/a"
console.info (a); / / has value
a.js
import c from". / c"
console.info ("bbbbbbbb",c); / / valuable
const a = {
created(){
/* let cc = new c();
cc.name="aaa"
console.info(cc.name); */
// c.name = "aaa"
}}
export default a
c.js
import a from". / a"
console.info ("cccccccccc", a); / / undefined Why undefined?
const c = {
name: "ccc"}
export default function () {
return {...c}}
your circular dependency of the es6 module causes
when the c module executes to console.info ('cccccccccc', a) ), the a variable in the a module has not yet been assigned, so the output is undefined
you can set a delay to try, it should have a value
es6 module mechanism can be found in
in-depth understanding of ES6 module mechanism
cyclic loading of JavaScript module
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