js.eval: Difference between revisions
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(Created page with "{{MacroFunction |name=js.eval |trusted=true |version=1.9.4 |description= Evaluates a string as a javascript expression. Supports ECMA 2021 standard. For security, access to...") |
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'''Parameters''' | '''Parameters''' | ||
* {{code|expression}} - A valid javascript fragment. It is wrapped inside an anonymous function. | * {{code|expression}} - A valid javascript fragment. It is wrapped inside an anonymous function. | ||
* {{code|arg1, arg2...}} - Any. Will be converted to the equivalent javascript type as needed. | * {{code|arg1, arg2...}} - Any. Will be converted to the equivalent javascript type as needed. Arguments are accessible via the {{code|args}} variable. | ||
* {{code|return}} - Any primitive type; Complex types are converted to (JSON) strings. | * {{code|return}} - Any primitive type; Complex types are converted to (JSON) strings. | ||
|example= | |example= | ||
Revision as of 06:13, 4 August 2021
js.eval() Function
Note: This function can only be used in a Trusted Macro
• Introduced in version 1.9.4
Evaluates a string as a javascript expression. Supports ECMA 2021 standard. For security, access to native types and external resources are limited. Similarly, all arrays passed in to the javascript environment are shallow copied, so changes to the array do not directly change MapTool's state.
Usage
js.eval(expression, arg1, arg2...)Parameters
expression- A valid javascript fragment. It is wrapped inside an anonymous function.arg1, arg2...- Any. Will be converted to the equivalent javascript type as needed. Arguments are accessible via theargsvariable.return- Any primitive type; Complex types are converted to (JSON) strings.
Example
Using
js.eval on an expression.
[r: js.eval("let a = [1,2,3]; return a[1] + args[0]"), 5]Output:
7