Microsoft/vscode
在 GitHub 查看[html] "Cannot redeclare block-scoped variable" in script type module
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#169,117 创建于 2022年12月14日
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描述
Does this issue occur when all extensions are disabled?: Yes
System:
- VS Code Version: Version: 1.74.0
- OS Version: macOS 13.0.1
Steps to Reproduce:
- Create a new HTML file
- Add two
<script type="module">and declare a variable with the same name in both (see example code below). - Observe the red squiggly line underneath the variable names saying Cannot redeclare block-scoped variable.
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When a script tag has the type attribute set to "module", the source text should be treated as an ES module with it's own scope, not the global scope.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script#attr-type https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules#other_differences_between_modules_and_standard_scripts
Example HTML
<!DOCTYPE html>
<script type="module">
const x = 1;
</script>
<script type="module">
const x = 2;
</script>