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This commit is contained in:
Ron Buckton
2016-03-01 15:26:29 -08:00
parent 7d05ba28bf
commit 186f5c8bca
1 changed files with 19 additions and 23 deletions
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42
src/compiler/transformers/jsx.ts
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@@ -71,35 +71,31 @@ namespace ts {
function visitJsxOpeningLikeElement(node: JsxOpeningLikeElement, children: JsxChild[]) {
const tagName = getTagName(node);
let objectProperties: Expression;
if (node.attributes.length === 0) {
const attrs = node.attributes;
if (attrs.length === 0) {
// When there are no attributes, React wants "null"
objectProperties = createNull();
}
else {
// Map spans of JsxAttribute nodes into object literals and spans
// of JsxSpreadAttribute nodes into expressions.
const segments = flatten(
spanMap(attrs, isJsxSpreadAttribute, (attrs, isSpread) => isSpread
? map(attrs, transformJsxSpreadAttributeToExpression)
: createObjectLiteral(map(attrs, transformJsxAttributeToObjectLiteralElement))
)
);
if (isJsxSpreadAttribute(attrs[0])) {
// We must always emit at least one object literal before a spread
// argument.
segments.unshift(createObjectLiteral());
}
// Either emit one big object literal (no spread attribs), or
// a call to React.__spread
const attrs = node.attributes;
if (!forEach(attrs, isJsxSpreadAttribute)) {
objectProperties = createObjectLiteral(map(node.attributes, transformJsxAttributeToObjectLiteralElement));
}
else {
objectProperties = createJsxSpread(compilerOptions.reactNamespace,
concatenate(
// We must always emit at least one object literal before a spread
// argument.
isJsxSpreadAttribute(attrs[0]) ? [createObjectLiteral()] : undefined,
// Map spans of JsxAttribute nodes into object literals and spans
// of JsxSpreadAttribute nodes into expressions.
flatten(
spanMap(attrs, isJsxSpreadAttribute, (attrs, isSpread) => isSpread
? map(attrs, transformJsxSpreadAttributeToExpression)
: createObjectLiteral(map(attrs, transformJsxAttributeToObjectLiteralElement))
)
)
)
);
}
objectProperties = singleOrUndefined(segments)
|| createJsxSpread(compilerOptions.reactNamespace, segments);
}
return createJsxCreateElement(