Create a way to evaluate arbitrary javascript

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評估

難度
5/5
預估耗時
一週以上
新手友好度
25/100
Issue 類型
功能
描述清晰度
需要釐清
活躍度
停滯
技術堆疊
javascript, python
領域
backend, frontend

研究方向

Start by reading the existing html.script and Django use_query hooks, then review the traceability comment in issue 857. Define how use_script should return JavaScript results, support asynchronous or deferred event execution, and handle the this keyword. Done means the proposed examples have a clear, working interface.

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描述

priority-3-low type-investigation
Current Situation

Currently, there is no method to transmit the results of a JavaScript function to the backend.

Proposed Actions

This might look like a use_script hook that operates similarly to html.script, but can return a result.

For example,

@component
def example():
    executor = use_script("getComputedStyle(document.querySelector('#element'))")
    return f"CSS Style Attributes: {executor.data}"

Since this hook would need to operate asynchronously, the interface would likely be heavily inspired by our Django use_query hook.

And perhaps it could be used as an executor within event contexts to be more "reactive":

@component
def example():
    executor = use_script("getComputedStyle(document.querySelector('#element'))", deferred=True)

    async def on_click(event):
        await executor()
        example_value = executor.data 

    return f"CSS Style Attributes: {script.data}"

See this comment for traceability.

Note: If possible, we should try pre-populate this keyword with something that makes sense, depending on where the JavaScript was executed.

主要語言
Python
星號
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分支
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