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Size: 1.23 KB
Versions: 3
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Stored size: 1.23 KB
Contents
export default function transformTopLevelComponent( /* env */) {
return {
name: 'transform-top-level-component',
visitor: {
Program(node) {
hasSingleComponentNode(node, (component) => {
component.tag = `@${component.tag}`;
component.isStatic = true;
});
},
},
};
}
function hasSingleComponentNode(program, componentCallback) {
let { loc, body } = program;
if (!loc || loc.start.line !== 1 || loc.start.column !== 0) {
return;
}
let lastComponentNode;
let nodeCount = 0;
for (let i = 0; i < body.length; i++) {
let curr = body[i];
// text node with whitespace only
if (curr.type === 'TextNode' && /^[\s]*$/.test(curr.chars)) {
continue;
}
// has multiple root elements if we've been here before
if (nodeCount++ > 0) {
return false;
}
if (curr.type === 'ComponentNode' || curr.type === 'ElementNode') {
lastComponentNode = curr;
}
}
if (!lastComponentNode) {
return;
}
if (lastComponentNode.type === 'ComponentNode') {
componentCallback(lastComponentNode);
}
}
Version data entries
3 entries across 3 versions & 1 rubygems