exports导出的是一个实例对象。
要调用导出的方法或者属性时,要用当前实例对象去调用。如下述代码中,导出的是builds对象,使用getAllBuilds方法时要调用此方法。
exports.js
const builds = {
// Runtime only (CommonJS). Used by bundlers e.g. Webpack & Browserify
'web-runtime-cjs-dev': {
entry: 'web/entry-runtime.js',
},
'web-runtime-cjs-prod': {
entry: 'web/entry-runtime.js',
},
// Runtime+compiler CommonJS build (CommonJS)
'web-full-cjs-dev': {
entry:'web/entry-runtime-with-compiler.js',
}
}
exports.getAllBuilds = () => Object.keys(builds);
test.js
let builds = require('./export');
console.log(builds);
console.log("-------------------");
console.log(builds.getAllBuilds);
console.log("-------------------");
console.log(builds.getAllBuilds());
执行结果:
module.exports导出的是对象本身
如下述代码中,导出的就是一个Function,可以直接执行
exports.js
const builds = {
// Runtime only (CommonJS). Used by bundlers e.g. Webpack & Browserify
'web-runtime-cjs-dev': {
entry: 'web/entry-runtime.js',
},
'web-runtime-cjs-prod': {
entry: 'web/entry-runtime.js',
},
// Runtime+compiler CommonJS build (CommonJS)
'web-full-cjs-dev': {
entry:'web/entry-runtime-with-compiler.js',
}
}
module.exports = () => Object.keys(builds);
// exports.getAllBuilds = () => Object.keys(builds);
test.js
let builds = require('./export');
console.log(builds);
console.log("-------------------");
console.log(builds());
执行结果:
说明:
exports和module.exports不要同时使用,否则,module.exports会覆盖exports.即exports失效。