我试图传达的代码是:
var React = require('react');
var ReactDOM = require('react-dom');
var listOfItems = <ul>
<li className="item-1">Item 1</li>
<li className="item-2">Item 2</li>
<li className="item-3">Item 3</li>
</ul>;
ReactDOM.render(listOfItems, document.getElementById('react-application'));
gulpfile.js如下所示:
var gulp = require('gulp');
var browserify = require('browserify');
var babelify = require('babelify');
var source = require('vinyl-source-stream');
gulp.task('default', function () {
return browserify('./source/app.js')
.transform(babelify)
.bundle()
.pipe(source('snapterest.js'))
.pipe(gulp.dest('./build/'));
});
但是,如果我尝试启动gulp
,它会给我这个错误:
[18:00:34] Using gulpfile ~/Documents/Esercitazioni/react/reactjs-essentials/snapterest/gulpfile.js
[18:00:34] Starting 'default'...
events.js:141
throw er; // Unhandled 'error' event
^
SyntaxError: /Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/source/app.js: Unexpected token (4:18)
2 | var ReactDOM = require('react-dom');
3 |
> 4 | var listOfItems = <ul>
| ^
5 | <li className="item-1">Item 1</li>
6 | <li className="item-2">Item 2</li>
7 | <li className="item-3">Item 3</li>
at Parser.pp.raise (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/location.js:22:13)
at Parser.pp.unexpected (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/util.js:91:8)
at Parser.pp.parseExprAtom (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:512:12)
at Parser.pp.parseExprSubscripts (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:270:19)
at Parser.pp.parseMaybeUnary (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:250:19)
at Parser.pp.parseExprOps (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:180:19)
at Parser.pp.parseMaybeConditional (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:157:19)
at Parser.pp.parseMaybeAssign (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/expression.js:120:19)
at Parser.pp.parseVar (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/statement.js:585:24)
at Parser.pp.parseVarStatement (/Users/macbookpro/Documents/Esercitazioni/react/reactjs-essentials/snapterest/node_modules/babelify/node_modules/babel-core/node_modules/babylon/lib/parser/statement.js:416:8)
答案 0 :(得分:6)
截至Babel 6.0.0,默认情况下不包含插件。要使babelify有用,您还必须包含一些presets和/或plugins。
在您的情况下,这意味着您需要babel-preset-es2015
和babel-preset-react
:
$ npm install --save-dev babel-preset-es2015 babel-preset-react
然后你需要告诉babelify
使用它们:
gulp.task('default', function () {
return browserify('./source/app.js')
.transform(babelify.configure({presets: ['es2015','react']}))
.bundle()
.pipe(source('snapterest.js'))
.pipe(gulp.dest('./build/'));
});
答案 1 :(得分:0)
将swift3
包裹在parens有帮助吗?
<li>