Alt Always

Alt Always is a PostHTML plugin that always add alt attribute for images that don't have it (accessibility reasons).

Every image must have an alt attribute. This is a requirement of HTML standard (with perhaps a few exceptions in HTML5). Images without an alt attribute are likely inaccessible. In some cases, images may be given an empty or null alt attribute (e.g., alt="").

Read more about Alternative Text.

<!-- BEFORE -->
<img src="image.jpg">
<img src="image.png" class="foo">
<img src="image.gif" alt="I already have alternative text">

<!-- AFTER -->
<img src="image.jpg" alt="">
<img src="image.png" class="foo" alt="">
<img src="image.gif" alt="I already have alternative text">

Usage

Add Alt Always to your build tool:

npm install posthtml-alt-always --save-dev

Node

require('posthtml-alt-always').process(YOUR_HTML, { /* options */ });

PostHTML

Add PostHTML to your build tool:

npm install posthtml --save-dev

Load Alt Always as a PostHTML plugin:

posthtml([
    require('posthtml-alt-always')({ /* options */ })
]).process(YOUR_HTML, /* options */);

Gulp

Add Gulp PostHTML to your build tool:

npm install gulp-posthtml --save-dev

Enable Alt Always within your Gulpfile:

var posthtml = require('gulp-posthtml');

gulp.task('html', function () {
    return gulp.src('./src/*.html').pipe(
        posthtml([
            require('posthtml-alt-always')({ /* options */ })
        ])
    ).pipe(
        gulp.dest('.')
    );
});

Grunt

Add Grunt PostHTML to your build tool:

npm install grunt-posthtml --save-dev

Enable alt-always within your Gruntfile:

grunt.loadNpmTasks('grunt-posthtml');

grunt.initConfig({
    posthtml: {
        options: {
            use: [
                require('posthtml-alt-always')({ /* options */ })
            ]
        },
        dist: {
            src: '*.html'
        }
    }
});