Internet Explorer encounters errors when processing LESS code

Currently experimenting with the combination of LESS and respond.js to facilitate the development of a new website. Both LESS and respond are incredibly useful tools. However, encountered several issues with LESS in Internet Explorer.

Initially, while in IE8 mode, my IE10 browser indicated that it did not recognize "map". No problem, I created an Array.prototype map extension. Next, it mentioned that it did not understand isArray, again in IE8 mode. Utilized prototype extensions to address this issue. Now, I am facing a SyntaxError: Invalid operand to 'in': Object expected.

Unsure about what exactly in refers to, and continually adding makeshift prototype extensions seems unsustainable. Is LESS incompatible with IE, or can someone provide a comprehensive guide on resolving these issues?

javascriptless

Answer №1

Solution to your inquiry:

Initially, it is important to note that LESS client side compilation is only supported in IE9+. To address this issue, you may consider implementing shims and polyfills for ES5, such as these.

However, it is advised to refrain from doing so.

Recommendation (disregard the previous section):

Despite the efficient caching mechanisms offered by the LESS compiler (e.g., using localStorage to store the compiled code), utilizing it in a production environment is not recommended.

GruntJS and Bower.io are command line tools that are relatively straightforward to set up and use. Once configured, you can simply forget they exist :)

Livereload provides a user-friendly interface and is exceptionally user-friendly.

I have employed GruntJS for frontend development alongside backend developers who work with PHP (CakePHP, Zend, Laravel), and it significantly streamlined our workflow :)

It would be more sensible to enhance your frontend development process by utilizing a task runner like GruntJS or Brunch.io, or by installing Livereload. These tools can monitor file changes, automatically generate a new CSS file upon saving, and even instantly reload your CSS.

You can set up GruntJS with the watch and LESS plugins to keep things simple. Additionally, you can opt to globally install the LESS Node.js package to handle the task efficiently.

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