问题
I have several bower components, of which I need some components like json3
, respondjs
, es5shim
to be added in an IE8 conditional block (in build as well as serve) like this :
<!--[if lt IE 9]>
<script src="bower_components/json3/json3.js"></script>
<![endif]-->
How should I proceed to write the task? I could not find any suitable examples with gulp-inject
as well as wiredep
for this issue. Please advise
回答1:
It is possible with gulp-filter and gulp-inject's starttag option.
Suppose you have the following injections defined in index.html
:
<!--[if lt IE 9]>
<![endif]-->
<!-- inject:js -->
<!-- endinject -->
You can wire them in gulpfile:
var gulp = require('gulp')
var bowerFiles = require('main-bower-files');
var gulpFilter = require('gulp-filter');
var gulpInject = require('gulp-inject');
gulp.task('wiredep', function() {
var ie8Files = ['**/json3.js', '**/es5shim.js'];
// the same as: var restFiles = ['*', '!**/json3.js', '!**/es5shim.js'];
var restFiles = ['*'].concat(ie8Files.map(function(e) { return '!' + e;}));
return gulp.src('index.html')
.pipe(gulpInject(gulp.src(bowerFiles(), {read: false}).pipe(gulpFilter(restFiles))))
.pipe(gulpInject(gulp.src(bowerFiles(), {read: false}).pipe(gulpFilter(ie8Files)),
{starttag: '<!--[if lt IE 9]>', endtag: '<![endif]-->'}))
.pipe(gulp.dest('dist'));
});
Which results in (for example):
<!--[if lt IE 9]>
<script src="bower_components/json3/json3.js"></script>
<script src="bower_components/shim/es5shim.js"></script>
<![endif]-->
<!-- inject:js -->
<script src="bower_components/jquery/jquery.js"></script>
<!-- endinject -->
来源:https://stackoverflow.com/questions/27794237/how-to-add-specific-bower-components-as-ie8-conditional-block-in-gulp