keeganstreet / element-finder Goto Github PK
View Code? Open in Web Editor NEWFind in Files with CSS selectors
Home Page: http://keegan.st/2012/06/03/find-in-files-with-css-selectors/
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Replace JSDOM and Sizzle with Cheerio
Cheerio runs 6 times faster in my initial tests. It also has fewer dependencies. The dependencies are JavaScript only which means users should have fewer installation problems.
Plain text output format
Overview
Would be great to use Element Finder to select the content of an HTML element based on its CSS path.
Example
For example, consider the following HTML document:
<html>
<body>
<div class="header">
<h1>Header</h1>
</div>
<div class="content">
<table>
<tbody>
<tr><td class="data">Tabular Content 1</td></tr>
<tr><td class="data">Tabular Content 2</td></tr>
</tbody>
</table>
</div>
<div class="footer">
<p>Footer</p>
</div>
</body>
</html>
I'd like to execute the following
elfindiner -s "td.data" -t page.html
This would write the following to standard output:
Tabular Content 1
Tabular Content 2
Does not correctly parse self-closing tags
E.g. .a .b will incorrectly find 2 results in the following case:
<div class="a">
<div class="b">Should match</div>
<div class="autoclosed" />
</div>
<div class="b">Should not match</div>Normalize whitespace, eliminate new lines
Another interesting feature would be to normalize whitespace and eliminate new line characters from content. For example:
<td class="data">This is a comment
that a user made.</td>
By normalizing whitespace and eliminating new lines, you could obtain cleaner data:
<td class="data">This is a comment that a user made.</td>
The content of the element can then be extracted:
This is a comment that a user made.
For example:
cat filename.html | elfinder --normalize-whitespace --no-eol --extract-content --selector "td.data"
TypeError in jsdom.js
Hey there,
just tried you nifty little project but got an error in the knee...
/xxx/htdocs/node_modules/jsdom/lib/jsdom.js:250
window.document.documentElement.appendChild(script);
^
TypeError: Cannot call method 'appendChild' of null
at exports.env.exports.jsdom.env.processHTML (/xxx/htdocs/node_modules/jsdom/lib/jsdom.js:250:41)
at Array.forEach (native)
at exports.env.exports.jsdom.env.processHTML (/xxx/htdocs/node_modules/jsdom/lib/jsdom.js:233:18)
at Object.exports.env.exports.jsdom.env (/xxx/htdocs/node_modules/jsdom/lib/jsdom.js:262:5)
at processFile (/xxx/htdocs/node_modules/element-finder/element-finder.js:141:10)
at walk.extension (/xxx/htdocs/node_modules/element-finder/element-finder.js:172:5)
at /xxx/htdocs/node_modules/element-finder/element-finder.js:92:10
at /xxx/htdocs/node_modules/element-finder/element-finder.js:92:10
at /xxx/htdocs/node_modules/element-finder/element-finder.js:92:10
at /xxx/htdocs/node_modules/element-finder/element-finder.js:92:10
Raising exception in domtosource 'The html and selector parameters are required''
Simply running the script on a jekyll based project folder, with any selector.
Found 1 match in /master/_site/index.html
/Element Finder/lib/submodule-elfinder/node_modules/domtosource/app.js:73
throw new Error('The html and selector parameters are required');
^Error: The html and selector parameters are required
at Object.find (/Element Finder/lib/submodule-elfinder/node_modules/domtosource/app.js:73:10)
at processFile (/Element Finder/lib/submodule-elfinder/element-finder.js:179:27)
at walk.extension (/Element Finder/lib/submodule-elfinder/element-finder.js:231:5)
at /Element Finder/lib/submodule-elfinder/element-finder.js:107:10
at /Element Finder/lib/submodule-elfinder/element-finder.js:107:10
Unsure why?
Write test cases with Mocha
Test cases are essential to know that the module runs correctly. These tests will need to be written before we switch over from JSDOM to Cheerio, so that we can be sure that the switch doesn't break Element Finder.
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