Details
Since Rslib have a configuration named syntax, when users specify syntax, it has a higher priority than .browserslistrc. And when users do not specify syntax, the default value will be esnext which will override the browsers list to last 1 versions of browsers.
See
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const composeSyntaxConfig = ( |
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target: RsbuildConfigOutputTarget, |
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syntax?: Syntax, |
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): EnvironmentConfig => { |
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// Defaults to ESNext, Rslib will assume all of the latest JavaScript and CSS features are supported. |
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if (syntax) { |
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return { |
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tools: { |
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rspack: (config) => { |
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config.target = transformSyntaxToRspackTarget(syntax); |
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}, |
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}, |
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output: { |
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overrideBrowserslist: transformSyntaxToBrowserslist(syntax, target), |
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}, |
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}; |
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} |
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return { |
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tools: { |
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rspack: (config) => { |
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config.target = ['es2022']; |
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return config; |
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}, |
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}, |
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output: { |
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// If `syntax` is not defined, Rslib will try to determine by the `target`, with the last version of the target. |
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overrideBrowserslist: ESX_TO_BROWSERSLIST.esnext(target), |
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}, |
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}; |
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}; |