9a8bbf4114
* Add AST * add make-shift testing parser, and make stuff ocmpile * add proper expression parser * make string format use ' * Add empty doc page for expressions * add tests * Clean up file structure and add unary operators * Write documentation
926 B
926 B
+++ title = "Eww expressions" slug = "Embedded eww expression language" weight = 6 +++
The embedded Eww expression-language
Within variable references, you can make use of a small, built-in expression language.
This can be used whereever you can use variable-references ({{varname}}).
Example
<button
class="{{if button_active then 'active' else 'inactive'}}"
onclick="toggle_thing">
{{if button_active then 'disable' else 'enable'}}
</button>
Some math: {{12 + 2 * 10}}
Syntax
The expression language supports:
- simple mathematical operations (
+,-,*,/,%) - comparisons (
==,!=,>,<) - boolean operations (
||,&&,!) - conditionals (
if condition then 'value' else 'other value') - numbers, strings, booleans and variable references (
12,'hi',true,some_variable)- strings can contain other expressions again:
'foo {{some_variable}} bar'
- strings can contain other expressions again: