Skip to content

pass test #130

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
evilrescuer wants to merge 2 commits into
base: master
Choose a base branch
from
Open

pass test #130

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
f3a2ac9
pass test
evilrescuer Mar 20, 2019
2ed655d
Migrated mocha to global
evilrescuer Mar 20, 2019
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
62 changes: 62 additions & 0 deletions package-lock.json
View file
Open in desktop

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

14 changes: 10 additions & 4 deletions test/test.js
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,8 @@ describe('this', function () {
say: function () {
setTimeout(() => {
// this 是什么？想想为什么？
this.should.equal(null)
// answer: 隐含绑定（Implicit Binding）
this.should.equal(obj)
done()
}, 0)
}
Expand All @@ -15,7 +16,8 @@ describe('this', function () {
it('global', function () {
function test() {
// this 是什么？想想为什么？
this.should.equal(null)
// answer: 默认绑定（Default Binding）
this.should.equal(global)
}
test()
})
Expand All @@ -26,7 +28,9 @@ describe('this', function () {
say: function () {
function _say() {
// this 是什么？想想为什么？
this.should.equal(null)
// answer: 1. 立即执行函数 -> 明确绑定了obj, 此时obj已经被声明提升，但还未赋值，是undefined
// 2. 而bind undefined，会把this绑定global
this.should.equal(global)
}
return _say.bind(obj)
}()
Expand All @@ -39,7 +43,9 @@ describe('this', function () {
obj.say = function () {
function _say() {
// this 是什么？想想为什么？
this.should.equal(null)
// answer: 1. 立即执行函数 -> 明确绑定了obj(this指向obj的地址，此时obj为{}),
// 2. obj.say()执行 -> 此时obj的值被改变(值为{ say: [Function: bound _say] })
this.should.equal(obj)
}
return _say.bind(obj)
}()
Expand Down