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fix(compiler-ssr): expand v-model option selected inclusion logic #13963

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fc0df0d
fix(compiler-ssr): expand v-model `option` selected inclusion logic
alex-snezhko Oct 5, 2025
15d6f92
fix: single text element trailing whitespace
alex-snezhko Oct 5, 2025
cced68b
fix: support select multiple
alex-snezhko Oct 12, 2025
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191 changes: 191 additions & 0 deletions packages/compiler-ssr/__tests__/ssrVModel.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,197 @@ describe('ssr: v-model', () => {
_push(\`<!--]--></optgroup></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model"><option>foo</option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, "foo")
: _ssrLooseEqual(_ctx.model, "foo"))) ? " selected" : ""
}>foo</option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model"><option> foo </option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, "foo")
: _ssrLooseEqual(_ctx.model, "foo"))) ? " selected" : ""
}> foo </option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model"><option>{{ myValue }}</option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, _ctx.myValue)
: _ssrLooseEqual(_ctx.model, _ctx.myValue))) ? " selected" : ""
}>\${
_ssrInterpolate(_ctx.myValue)
}</option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model">
<option>
A
B
<!--comment-->
<!--comment-->
C
{{ myValue1 }}
D
<!--comment-->
{{ myValue2 }}
<!--comment-->E
<!--comment-->
</option>
</select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, \`\${
"A B C "
}\${
_ctx.myValue1
}\${
" D "
}\${
_ctx.myValue2
}\${
" E"
}\`)
: _ssrLooseEqual(_ctx.model, \`\${
"A B C "
}\${
_ctx.myValue1
}\${
" D "
}\${
_ctx.myValue2
}\${
" E"
}\`))) ? " selected" : ""
}> A B <!--comment--><!--comment--> C \${
_ssrInterpolate(_ctx.myValue1)
} D <!--comment--> \${
_ssrInterpolate(_ctx.myValue2)
} <!--comment-->E <!--comment--></option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model"><option v-text="foo"></option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, _ctx.foo)
: _ssrLooseEqual(_ctx.model, _ctx.foo))) ? " selected" : ""
}>\${
_ssrInterpolate(_ctx.foo)
}</option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select v-model="model"><option v-text="'foo'"></option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs, ssrInterpolate: _ssrInterpolate } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, 'foo')
: _ssrLooseEqual(_ctx.model, 'foo'))) ? " selected" : ""
}>\${
_ssrInterpolate('foo')
}</option></select></div>\`)
}"
`)

expect(
compileWithWrapper(`<select v-model="model"><option></option></select>`)
.code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, "")
: _ssrLooseEqual(_ctx.model, ""))) ? " selected" : ""
}></option></select></div>\`)
}"
`)

expect(
compileWithWrapper(
`<select multiple v-model="model"><option>1</option><option>2</option></select>`,
).code,
).toMatchInlineSnapshot(`
"const { ssrIncludeBooleanAttr: _ssrIncludeBooleanAttr, ssrLooseContain: _ssrLooseContain, ssrLooseEqual: _ssrLooseEqual, ssrRenderAttrs: _ssrRenderAttrs } = require("vue/server-renderer")

return function ssrRender(_ctx, _push, _parent, _attrs) {
_push(\`<div\${
_ssrRenderAttrs(_attrs)
}><select multiple><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, "1")
: _ssrLooseEqual(_ctx.model, "1"))) ? " selected" : ""
}>1</option><option\${
(_ssrIncludeBooleanAttr((Array.isArray(_ctx.model))
? _ssrLooseContain(_ctx.model, "2")
: _ssrLooseEqual(_ctx.model, "2"))) ? " selected" : ""
}>2</option></select></div>\`)
}"
`)
})

test('<input type="radio">', () => {
Expand Down
97 changes: 96 additions & 1 deletion packages/compiler-ssr/src/transforms/ssrVModel.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,12 +6,16 @@ import {
NodeTypes,
type PlainElementNode,
type TemplateChildNode,
type TemplateLiteral,
type TextNode,
createCallExpression,
createConditionalExpression,
createDOMCompilerError,
createInterpolation,
createObjectProperty,
createSimpleExpression,
createTemplateLiteral,
findDir,
findProp,
hasDynamicKeyVBind,
transformModel,
Expand Down Expand Up @@ -54,7 +58,7 @@ export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
function processOption(plainNode: PlainElementNode) {
if (plainNode.tag === 'option') {
if (plainNode.props.findIndex(p => p.name === 'selected') === -1) {
const value = findValueBinding(plainNode)
const value = findOptionValue(plainNode)
plainNode.ssrCodegenNode!.elements.push(
createConditionalExpression(
createCallExpression(context.helper(SSR_INCLUDE_BOOLEAN_ATTR), [
Expand Down Expand Up @@ -190,6 +194,59 @@ export const ssrTransformModel: DirectiveTransform = (dir, node, context) => {
}
}

function findOptionValue(
node: PlainElementNode,
): ExpressionNode | TemplateLiteral {
const valueBinding = findProp(node, 'value')
if (valueBinding) {
return valueBinding.type === NodeTypes.DIRECTIVE
? valueBinding.exp!
: createSimpleExpression(valueBinding.value!.content, true)
}

const textDir = findDir(node, 'text')
if (textDir) {
return textDir.exp!
}

if (
node.children.every(
x =>
x.type === NodeTypes.TEXT ||
x.type === NodeTypes.COMMENT ||
x.type === NodeTypes.INTERPOLATION,
)
) {
const relevantNodes = collapseTextBetweenComments(node.children).filter(
x => x.type !== NodeTypes.COMMENT,
)
if (relevantNodes.length) {
const expressions = relevantNodes.map((x, i) => {
if (x.type === NodeTypes.TEXT) {
let content = x.content
if (i === 0) {
content = content.trimStart()
}
if (i === relevantNodes.length - 1) {
content = content.trimEnd()
}
return createSimpleExpression(content, true)
} else {
return x.content
}
})

if (expressions.length === 1) {
return expressions[0]
} else {
return createTemplateLiteral(expressions)
}
}
}

return createSimpleExpression(``, true)
}

function findValueBinding(node: PlainElementNode): ExpressionNode {
const valueBinding = findProp(node, 'value')
return valueBinding
Expand All @@ -198,3 +255,41 @@ function findValueBinding(node: PlainElementNode): ExpressionNode {
: createSimpleExpression(valueBinding.value!.content, true)
: createSimpleExpression(`null`, false)
}

function collapseTextBetweenComments<T extends TemplateChildNode>(
children: T[],
) {
const result: (T | TextNode)[] = []
let prevTextNode: TextNode | undefined
for (let i = 0; i < children.length; i++) {
const child = children[i]
if (child.type === NodeTypes.TEXT) {
if (prevTextNode) {
const prevContent = prevTextNode.content
let thisContent = child.content
if (prevContent.endsWith(' ') && thisContent.startsWith(' ')) {
thisContent = thisContent.slice(1)
}
const combined: TextNode = {
...prevTextNode,
content: prevContent + thisContent,
}
prevTextNode = combined
} else {
prevTextNode = child
}
} else if (child.type === NodeTypes.COMMENT) {
continue
} else {
if (prevTextNode) {
result.push(prevTextNode)
prevTextNode = undefined
}
result.push(child)
}
}
if (prevTextNode) {
result.push(prevTextNode)
}
return result
}
22 changes: 22 additions & 0 deletions packages/server-renderer/__tests__/ssrDirectives.spec.ts
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,28 @@ describe('ssr: directives', () => {
`<select><option value="0"></option><option value="1" selected></option></select>`,
)

expect(
await renderToString(
createApp({
data: () => ({ model: 'f0o', zero: 0 }),
template: `<select v-model="model"><option>f{{ zero }}o</option><option>bar</option></select>`,
}),
),
).toBe(
`<select><option selected>f0o</option><option>bar</option></select>`,
)

expect(
await renderToString(
createApp({
data: () => ({ model: 'foo', opt1Val: 'foo', opt2Val: 'bar' }),
template: `<select v-model="model"><option v-text="opt1Val"></option><option v-text="opt2Val"></option></select>`,
}),
),
).toBe(
`<select><option selected>foo</option><option>bar</option></select>`,
)

expect(
await renderToString(
createApp({
Expand Down
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