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Add read filter option #3

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Add read filter option #3

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cecb20c
Adding a filter option to read operations, defaults to the identity f…
May 9, 2013
1e0c138
Updating the README with instructions on filtering read operations
May 9, 2013
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4 changes: 2 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ grunt.initConfig({
your_target: {
options: {
//You typically would only specify one option per target but they may be combined
read: {selector:'link',attribute:'href',writeto:'myCssRefs',isPath:true},
read: {selector:'link',attribute:'href',writeto:'myCssRefs',isPath:true, filter:function(val){return val;}},
remove: '#removeMe',
update: {selector:'html',attribute:'appmode',value:'production'},
append: {selector:'body',html:'<div id="appended">Im being appended</div>'},
Expand All @@ -55,7 +55,7 @@ grunt.initConfig({
Note: each option (except callback) requires a `selector`. This can be any valid JQuery selector.

#### options.read
Extract the value of a given attribute from the set of matched elements then set the values into `dom_munger.data.{writeto}`. A typical use-case is to grab the script references from your html file and pass that to `concat`,`uglify`, or `cssmin`.
Extract the value of a given attribute from the set of matched elements then set the values into `dom_munger.data.{writeto}`. If you pass a `filter` function it will be called against each attribute retrieved. A typical use-case is to grab the script references from your html file and pass that to `concat`,`uglify`, or `cssmin`.

```js
grunt.initConfig({
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5 changes: 4 additions & 1 deletion tasks/dom_munger.js
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Expand Up @@ -58,8 +58,11 @@ module.exports = function(grunt) {
if (!options.read.selector || !options.read.attribute || !options.read.writeto){
grunt.log.error('Read config missing selector, attribute, and/or writeto options');
} else {
if(!options.read.filter) {
options.read.filter = function(val) {return val;};
}
var vals = $.map($(options.read.selector),function(elem){
return $(elem).attr(options.read.attribute);
return options.read.filter($(elem).attr(options.read.attribute));
});

if (options.read.isPath){
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