What does the elide_attributes filter do?

Removes HTML attributes that are set to their default values. For example, becomes because get is the default method.

Is elide_attributes enabled by default?

No. elide_attributes is not in CoreFilters, the default RewriteLevel; it runs only when you enable it by name with EnableFilters.

How do I enable elide_attributes on Apache and nginx?

Add ModPagespeedEnableFilters elide_attributes on Apache or pagespeed EnableFilters elide_attributes; on nginx. On IIS, add pagespeed EnableFilters elide_attributes to pagespeed.config.

filter · HTML filters

Elide attributes (elide_attributes)

Category:: HTML
CoreFilters:: No
OptimizeForBandwidth:: No
Risk:: Generally safe

Removes HTML attributes that are set to their default values. For example, <form method="get"> becomes <form> because get is the default method.

When to use it

Not in CoreFilters: it runs only when you enable it by name.
Risk rating on these docs: Generally safe.

Risks

The HTML filters page lists no specific risks for this filter. If a page misbehaves with it, DisableFilters elide_attributes turns it off for the scope you set it in.

Configuration

Enable it in the module configuration, at server, virtual-host or location scope:

Apache

ModPagespeedEnableFilters elide_attributes

nginx

pagespeed EnableFilters elide_attributes;

IIS (pagespeed.config)

pagespeed EnableFilters elide_attributes

Scoping, ForbidFilters and the thresholds filters read: Choosing filters .

Live example

Removes attributes whose value is the browser default.

Measured on the demo page, original against optimized:

HTML size

193 B → 182 B −6%

See the before and after, with the source diff →

Frequently asked questions

What does the elide_attributes filter do?: Removes HTML attributes that are set to their default values. For example, <form method="get"> becomes <form> because get is the default method.
Is elide_attributes enabled by default?: No. elide_attributes is not in CoreFilters, the default RewriteLevel; it runs only when you enable it by name with EnableFilters.
How do I enable elide_attributes on Apache and nginx?: Add ModPagespeedEnableFilters elide_attributes on Apache or pagespeed EnableFilters elide_attributes; on nginx. On IIS, add pagespeed EnableFilters elide_attributes to pagespeed.config.

add_base_tag — Add base tag
add_head — Add head
add_ids — Add IDs
add_instrumentation — Add instrumentation
collapse_whitespace — Collapse whitespace
combine_heads — Combine heads
compute_statistics — Compute HTML statistics
convert_meta_tags — Convert meta tags

This page is drawn from the elide_attributes entry on HTML filters. Every filter in one table: PageSpeed filters.