How to know if a variable is a global variable when writing a babel plug-in
1
I want to write a babel plugin that blocks global variables such as document and xhr from part of the code。
But I don't know how to tell if it belongs to window.
Example:
function queryClass(name){
return document.querySelector(`.${name}`);
// or return window.document.querySelector(`.${name}`)
}
I hope it turns into this
function queryClass(name){
return noDocument.querySelector(`.${name}`);
// or return window.noDocument.querySelector(`.${name}`)
}
But I don't want this code to be converted:
const document = {querySelector(str){return str + '1'}}
function queryClass(name){
return document.querySelector(`.${name}`);
// or return obj.document.querySelector(`.${name}`)
}
So I think I should learn to judge if it's a global variable.
Or is there any other way to help me achieve this?
This is my simple babel code:
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const visitor = {
Identifier(path) {
if(path.isIdentifier({name: 'document'})){
// How to judge if it's a global variable
path.node.name = 'noDocument';
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
babel
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
add a comment |
1
I want to write a babel plugin that blocks global variables such as document and xhr from part of the code。
But I don't know how to tell if it belongs to window.
Example:
function queryClass(name){
return document.querySelector(`.${name}`);
// or return window.document.querySelector(`.${name}`)
}
I hope it turns into this
function queryClass(name){
return noDocument.querySelector(`.${name}`);
// or return window.noDocument.querySelector(`.${name}`)
}
But I don't want this code to be converted:
const document = {querySelector(str){return str + '1'}}
function queryClass(name){
return document.querySelector(`.${name}`);
// or return obj.document.querySelector(`.${name}`)
}
So I think I should learn to judge if it's a global variable.
Or is there any other way to help me achieve this?
This is my simple babel code:
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const visitor = {
Identifier(path) {
if(path.isIdentifier({name: 'document'})){
// How to judge if it's a global variable
path.node.name = 'noDocument';
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
babel
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
add a comment |
1
1
1
I want to write a babel plugin that blocks global variables such as document and xhr from part of the code。
But I don't know how to tell if it belongs to window.
Example:
function queryClass(name){
return document.querySelector(`.${name}`);
// or return window.document.querySelector(`.${name}`)
}
I hope it turns into this
function queryClass(name){
return noDocument.querySelector(`.${name}`);
// or return window.noDocument.querySelector(`.${name}`)
}
But I don't want this code to be converted:
const document = {querySelector(str){return str + '1'}}
function queryClass(name){
return document.querySelector(`.${name}`);
// or return obj.document.querySelector(`.${name}`)
}
So I think I should learn to judge if it's a global variable.
Or is there any other way to help me achieve this?
This is my simple babel code:
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const visitor = {
Identifier(path) {
if(path.isIdentifier({name: 'document'})){
// How to judge if it's a global variable
path.node.name = 'noDocument';
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
babel
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
I want to write a babel plugin that blocks global variables such as document and xhr from part of the code。
But I don't know how to tell if it belongs to window.
Example:
function queryClass(name){
return document.querySelector(`.${name}`);
// or return window.document.querySelector(`.${name}`)
}
I hope it turns into this
function queryClass(name){
return noDocument.querySelector(`.${name}`);
// or return window.noDocument.querySelector(`.${name}`)
}
But I don't want this code to be converted:
const document = {querySelector(str){return str + '1'}}
function queryClass(name){
return document.querySelector(`.${name}`);
// or return obj.document.querySelector(`.${name}`)
}
So I think I should learn to judge if it's a global variable.
Or is there any other way to help me achieve this?
This is my simple babel code:
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const visitor = {
Identifier(path) {
if(path.isIdentifier({name: 'document'})){
// How to judge if it's a global variable
path.node.name = 'noDocument';
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
babel
babel
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
edited Nov 27 '18 at 6:34
张嘉永
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
asked Nov 27 '18 at 5:18
张嘉永张嘉永
164
164
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
1
I just find a way to do this.
I don't know if it's a good idea.
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const updateParamNameVisitor = {
Identifier(path) {
if (path.node.name === this.from) {
path.replaceWith(this.to);
}
}
};
const visitor = {
Program(path){
if(path.scope.globals.document){
const node = path.scope.generateUidIdentifier('no_document');
path.traverse(updateParamNameVisitor, { from: 'document', to: node })
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
1
I just find a way to do this.
I don't know if it's a good idea.
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const updateParamNameVisitor = {
Identifier(path) {
if (path.node.name === this.from) {
path.replaceWith(this.to);
}
}
};
const visitor = {
Program(path){
if(path.scope.globals.document){
const node = path.scope.generateUidIdentifier('no_document');
path.traverse(updateParamNameVisitor, { from: 'document', to: node })
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
add a comment |
1
I just find a way to do this.
I don't know if it's a good idea.
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const updateParamNameVisitor = {
Identifier(path) {
if (path.node.name === this.from) {
path.replaceWith(this.to);
}
}
};
const visitor = {
Program(path){
if(path.scope.globals.document){
const node = path.scope.generateUidIdentifier('no_document');
path.traverse(updateParamNameVisitor, { from: 'document', to: node })
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
add a comment |
1
1
1
I just find a way to do this.
I don't know if it's a good idea.
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const updateParamNameVisitor = {
Identifier(path) {
if (path.node.name === this.from) {
path.replaceWith(this.to);
}
}
};
const visitor = {
Program(path){
if(path.scope.globals.document){
const node = path.scope.generateUidIdentifier('no_document');
path.traverse(updateParamNameVisitor, { from: 'document', to: node })
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
I just find a way to do this.
I don't know if it's a good idea.
const babel = require("@babel/core");
const code = `
function queryClass(name){
return window.document.querySelector(`.${name}`);
}
`;
const updateParamNameVisitor = {
Identifier(path) {
if (path.node.name === this.from) {
path.replaceWith(this.to);
}
}
};
const visitor = {
Program(path){
if(path.scope.globals.document){
const node = path.scope.generateUidIdentifier('no_document');
path.traverse(updateParamNameVisitor, { from: 'document', to: node })
}
}
}
const result = babel.transform(code, {
plugins: [{visitor}]
});
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
answered Nov 27 '18 at 8:26
张嘉永张嘉永
164
164
add a comment |
add a comment |
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