Press n or j to go to the next uncovered block, b, p or k for the previous block.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 | 2x 2x 2x 2x 130x 124x 124x 124x 124x 151x 151x 5x 5x 151x 124x 124x 86x 86x 86x 86x 86x 116x 38x 38x 38x 38x 38x 38x 38x 124x 130x 130x 2x 2x 168x 168x 168x 168x 168x 168x 168x 131x 168x 1x 1x 1x 1x 1x 1x 168x 49x 49x 168x 168x 116x 116x 116x 116x 116x 116x 116x 116x 86x 86x 160x 52x 52x 52x 52x 61x 61x 7x 7x 7x 7x 54x 54x 52x 4x 61x 2x 2x 2x 61x 46x 46x 12x 46x 1x 1x 1x 1x 46x 46x 46x 46x 45x 6x 6x 6x 3x 1x 46x 4x 4x 46x 46x 46x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 46x 46x 46x 46x 46x 46x 61x 6x 6x 6x 6x 52x 52x 52x 168x 162x 162x 162x 162x 162x 162x 162x 162x 162x 162x 162x 124x 124x 124x 124x 124x 124x 96x 96x 96x 96x 96x 96x 96x 96x 122x 28x 28x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 124x 28x 7x 7x 7x 27x 21x 21x 21x 20x 3x 21x 3x 3x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 21x 124x 96x 96x 96x 93x 93x 96x 96x 96x 124x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 38x 38x 38x 38x 46x 45x 7x 45x 38x 38x 46x 1x 1x 46x 38x | import { type NodeTransform, type TransformContext, createStructuralDirectiveTransform, traverseNode, } from '../transform' import { type AttributeNode, type BlockCodegenNode, type CacheExpression, ConstantTypes, type DirectiveNode, type ElementNode, ElementTypes, type IfBranchNode, type IfConditionalExpression, type IfNode, type MemoExpression, NodeTypes, type SimpleExpressionNode, convertToBlock, createCallExpression, createConditionalExpression, createObjectExpression, createObjectProperty, createSimpleExpression, createVNodeCall, locStub, } from '../ast' import { ErrorCodes, createCompilerError } from '../errors' import { processExpression } from './transformExpression' import { validateBrowserExpression } from '../validateExpression' import { cloneLoc } from '../parser' import { CREATE_COMMENT, FRAGMENT } from '../runtimeHelpers' import { findDir, findProp, getMemoedVNodeCall, injectProp } from '../utils' import { PatchFlags } from '@vue/shared' export const transformIf: NodeTransform = createStructuralDirectiveTransform( /^(if|else|else-if)$/, (node, dir, context) => { return processIf(node, dir, context, (ifNode, branch, isRoot) => { // #1587: We need to dynamically increment the key based on the current // node's sibling nodes, since chained v-if/else branches are // rendered at the same depth const siblings = context.parent!.children let i = siblings.indexOf(ifNode) let key = 0 while (i-- >= 0) { const sibling = siblings[i] if (sibling && sibling.type === NodeTypes.IF) { key += sibling.branches.length } } // Exit callback. Complete the codegenNode when all children have been // transformed. return () => { if (isRoot) { ifNode.codegenNode = createCodegenNodeForBranch( branch, key, context, ) as IfConditionalExpression } else { // attach this branch's codegen node to the v-if root. const parentCondition = getParentCondition(ifNode.codegenNode!) parentCondition.alternate = createCodegenNodeForBranch( branch, key + ifNode.branches.length - 1, context, ) } } }) }, ) // target-agnostic transform used for both Client and SSR export function processIf( node: ElementNode, dir: DirectiveNode, context: TransformContext, processCodegen?: ( node: IfNode, branch: IfBranchNode, isRoot: boolean, ) => (() => void) | undefined, ): (() => void) | undefined { if ( dir.name !== 'else' && (!dir.exp || !(dir.exp as SimpleExpressionNode).content.trim()) ) { const loc = dir.exp ? dir.exp.loc : node.loc context.onError( createCompilerError(ErrorCodes.X_V_IF_NO_EXPRESSION, dir.loc), ) dir.exp = createSimpleExpression(`true`, false, loc) } if (!__BROWSER__ && context.prefixIdentifiers && dir.exp) { // dir.exp can only be simple expression because vIf transform is applied // before expression transform. dir.exp = processExpression(dir.exp as SimpleExpressionNode, context) } if (__DEV__ && __BROWSER__ && dir.exp) { validateBrowserExpression(dir.exp as SimpleExpressionNode, context) } if (dir.name === 'if') { const branch = createIfBranch(node, dir) const ifNode: IfNode = { type: NodeTypes.IF, loc: cloneLoc(node.loc), branches: [branch], } context.replaceNode(ifNode) if (processCodegen) { return processCodegen(ifNode, branch, true) } } else { // locate the adjacent v-if const siblings = context.parent!.children const comments = [] let i = siblings.indexOf(node) while (i-- >= -1) { const sibling = siblings[i] if (sibling && sibling.type === NodeTypes.COMMENT) { context.removeNode(sibling) __DEV__ && comments.unshift(sibling) continue } if ( sibling && sibling.type === NodeTypes.TEXT && !sibling.content.trim().length ) { context.removeNode(sibling) continue } if (sibling && sibling.type === NodeTypes.IF) { // Check if v-else was followed by v-else-if if ( dir.name === 'else-if' && sibling.branches[sibling.branches.length - 1].condition === undefined ) { context.onError( createCompilerError(ErrorCodes.X_V_ELSE_NO_ADJACENT_IF, node.loc), ) } // move the node to the if node's branches context.removeNode() const branch = createIfBranch(node, dir) if ( __DEV__ && comments.length && // #3619 ignore comments if the v-if is direct child of <transition> !( context.parent && context.parent.type === NodeTypes.ELEMENT && (context.parent.tag === 'transition' || context.parent.tag === 'Transition') ) ) { branch.children = [...comments, ...branch.children] } // check if user is forcing same key on different branches if (__DEV__ || !__BROWSER__) { const key = branch.userKey if (key) { sibling.branches.forEach(({ userKey }) => { if (isSameKey(userKey, key)) { context.onError( createCompilerError( ErrorCodes.X_V_IF_SAME_KEY, branch.userKey!.loc, ), ) } }) } } sibling.branches.push(branch) const onExit = processCodegen && processCodegen(sibling, branch, false) // since the branch was removed, it will not be traversed. // make sure to traverse here. traverseNode(branch, context) // call on exit if (onExit) onExit() // make sure to reset currentNode after traversal to indicate this // node has been removed. context.currentNode = null } else { context.onError( createCompilerError(ErrorCodes.X_V_ELSE_NO_ADJACENT_IF, node.loc), ) } break } } } function createIfBranch(node: ElementNode, dir: DirectiveNode): IfBranchNode { const isTemplateIf = node.tagType === ElementTypes.TEMPLATE return { type: NodeTypes.IF_BRANCH, loc: node.loc, condition: dir.name === 'else' ? undefined : dir.exp, children: isTemplateIf && !findDir(node, 'for') ? node.children : [node], userKey: findProp(node, `key`), isTemplateIf, } } function createCodegenNodeForBranch( branch: IfBranchNode, keyIndex: number, context: TransformContext, ): IfConditionalExpression | BlockCodegenNode | MemoExpression { if (branch.condition) { return createConditionalExpression( branch.condition, createChildrenCodegenNode(branch, keyIndex, context), // make sure to pass in asBlock: true so that the comment node call // closes the current block. createCallExpression(context.helper(CREATE_COMMENT), [ __DEV__ ? '"v-if"' : '""', 'true', ]), ) as IfConditionalExpression } else { return createChildrenCodegenNode(branch, keyIndex, context) } } function createChildrenCodegenNode( branch: IfBranchNode, keyIndex: number, context: TransformContext, ): BlockCodegenNode | MemoExpression { const { helper } = context const keyProperty = createObjectProperty( `key`, createSimpleExpression( `${keyIndex}`, false, locStub, ConstantTypes.CAN_CACHE, ), ) const { children } = branch const firstChild = children[0] const needFragmentWrapper = children.length !== 1 || firstChild.type !== NodeTypes.ELEMENT if (needFragmentWrapper) { if (children.length === 1 && firstChild.type === NodeTypes.FOR) { // optimize away nested fragments when child is a ForNode const vnodeCall = firstChild.codegenNode! injectProp(vnodeCall, keyProperty, context) return vnodeCall } else { let patchFlag = PatchFlags.STABLE_FRAGMENT // check if the fragment actually contains a single valid child with // the rest being comments if ( __DEV__ && !branch.isTemplateIf && children.filter(c => c.type !== NodeTypes.COMMENT).length === 1 ) { patchFlag |= PatchFlags.DEV_ROOT_FRAGMENT } return createVNodeCall( context, helper(FRAGMENT), createObjectExpression([keyProperty]), children, patchFlag, undefined, undefined, true, false, false /* isComponent */, branch.loc, ) } } else { const ret = (firstChild as ElementNode).codegenNode as | BlockCodegenNode | MemoExpression const vnodeCall = getMemoedVNodeCall(ret) // Change createVNode to createBlock. if (vnodeCall.type === NodeTypes.VNODE_CALL) { convertToBlock(vnodeCall, context) } // inject branch key injectProp(vnodeCall, keyProperty, context) return ret } } function isSameKey( a: AttributeNode | DirectiveNode | undefined, b: AttributeNode | DirectiveNode, ): boolean { if (!a || a.type !== b.type) { return false } if (a.type === NodeTypes.ATTRIBUTE) { if (a.value!.content !== (b as AttributeNode).value!.content) { return false } } else { // directive const exp = a.exp! const branchExp = (b as DirectiveNode).exp! if (exp.type !== branchExp.type) { return false } if ( exp.type !== NodeTypes.SIMPLE_EXPRESSION || exp.isStatic !== (branchExp as SimpleExpressionNode).isStatic || exp.content !== (branchExp as SimpleExpressionNode).content ) { return false } } return true } function getParentCondition( node: IfConditionalExpression | CacheExpression, ): IfConditionalExpression { while (true) { if (node.type === NodeTypes.JS_CONDITIONAL_EXPRESSION) { if (node.alternate.type === NodeTypes.JS_CONDITIONAL_EXPRESSION) { node = node.alternate } else { return node } } else if (node.type === NodeTypes.JS_CACHE_EXPRESSION) { node = node.value as IfConditionalExpression } } } |