@angular/core
Version:
Angular - the core framework
278 lines • 38.8 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { formatRuntimeError, RuntimeError } from '../../errors';
import { CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA } from '../../metadata/schema';
import { throwError } from '../../util/assert';
import { getComponentDef } from '../definition';
import { CONTEXT, DECLARATION_COMPONENT_VIEW } from '../interfaces/view';
import { isAnimationProp } from '../util/attrs_utils';
let shouldThrowErrorOnUnknownElement = false;
/**
* Sets a strict mode for JIT-compiled components to throw an error on unknown elements,
* instead of just logging the error.
* (for AOT-compiled ones this check happens at build time).
*/
export function ɵsetUnknownElementStrictMode(shouldThrow) {
shouldThrowErrorOnUnknownElement = shouldThrow;
}
/**
* Gets the current value of the strict mode.
*/
export function ɵgetUnknownElementStrictMode() {
return shouldThrowErrorOnUnknownElement;
}
let shouldThrowErrorOnUnknownProperty = false;
/**
* Sets a strict mode for JIT-compiled components to throw an error on unknown properties,
* instead of just logging the error.
* (for AOT-compiled ones this check happens at build time).
*/
export function ɵsetUnknownPropertyStrictMode(shouldThrow) {
shouldThrowErrorOnUnknownProperty = shouldThrow;
}
/**
* Gets the current value of the strict mode.
*/
export function ɵgetUnknownPropertyStrictMode() {
return shouldThrowErrorOnUnknownProperty;
}
/**
* Validates that the element is known at runtime and produces
* an error if it's not the case.
* This check is relevant for JIT-compiled components (for AOT-compiled
* ones this check happens at build time).
*
* The element is considered known if either:
* - it's a known HTML element
* - it's a known custom element
* - the element matches any directive
* - the element is allowed by one of the schemas
*
* @param element Element to validate
* @param lView An `LView` that represents a current component that is being rendered
* @param tagName Name of the tag to check
* @param schemas Array of schemas
* @param hasDirectives Boolean indicating that the element matches any directive
*/
export function validateElementIsKnown(element, lView, tagName, schemas, hasDirectives) {
// If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT
// mode where this check happens at compile time. In JIT mode, `schemas` is always present and
// defined as an array (as an empty array in case `schemas` field is not defined) and we should
// execute the check below.
if (schemas === null)
return;
// If the element matches any directive, it's considered as valid.
if (!hasDirectives && tagName !== null) {
// The element is unknown if it's an instance of HTMLUnknownElement, or it isn't registered
// as a custom element. Note that unknown elements with a dash in their name won't be instances
// of HTMLUnknownElement in browsers that support web components.
const isUnknown =
// Note that we can't check for `typeof HTMLUnknownElement === 'function'` because
// Domino doesn't expose HTMLUnknownElement globally.
(typeof HTMLUnknownElement !== 'undefined' &&
HTMLUnknownElement &&
element instanceof HTMLUnknownElement) ||
(typeof customElements !== 'undefined' &&
tagName.indexOf('-') > -1 &&
!customElements.get(tagName));
if (isUnknown && !matchingSchemas(schemas, tagName)) {
const isHostStandalone = isHostComponentStandalone(lView);
const templateLocation = getTemplateLocationDetails(lView);
const schemas = `'${isHostStandalone ? '@Component' : '@NgModule'}.schemas'`;
let message = `'${tagName}' is not a known element${templateLocation}:\n`;
message += `1. If '${tagName}' is an Angular component, then verify that it is ${isHostStandalone
? "included in the '@Component.imports' of this component"
: 'a part of an @NgModule where this component is declared'}.\n`;
if (tagName && tagName.indexOf('-') > -1) {
message += `2. If '${tagName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the ${schemas} of this component to suppress this message.`;
}
else {
message += `2. To allow any element add 'NO_ERRORS_SCHEMA' to the ${schemas} of this component.`;
}
if (shouldThrowErrorOnUnknownElement) {
throw new RuntimeError(304 /* RuntimeErrorCode.UNKNOWN_ELEMENT */, message);
}
else {
console.error(formatRuntimeError(304 /* RuntimeErrorCode.UNKNOWN_ELEMENT */, message));
}
}
}
}
/**
* Validates that the property of the element is known at runtime and returns
* false if it's not the case.
* This check is relevant for JIT-compiled components (for AOT-compiled
* ones this check happens at build time).
*
* The property is considered known if either:
* - it's a known property of the element
* - the element is allowed by one of the schemas
* - the property is used for animations
*
* @param element Element to validate
* @param propName Name of the property to check
* @param tagName Name of the tag hosting the property
* @param schemas Array of schemas
*/
export function isPropertyValid(element, propName, tagName, schemas) {
// If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT
// mode where this check happens at compile time. In JIT mode, `schemas` is always present and
// defined as an array (as an empty array in case `schemas` field is not defined) and we should
// execute the check below.
if (schemas === null)
return true;
// The property is considered valid if the element matches the schema, it exists on the element,
// or it is synthetic.
if (matchingSchemas(schemas, tagName) || propName in element || isAnimationProp(propName)) {
return true;
}
// Note: `typeof Node` returns 'function' in most browsers, but is undefined with domino.
return typeof Node === 'undefined' || Node === null || !(element instanceof Node);
}
/**
* Logs or throws an error that a property is not supported on an element.
*
* @param propName Name of the invalid property
* @param tagName Name of the tag hosting the property
* @param nodeType Type of the node hosting the property
* @param lView An `LView` that represents a current component
*/
export function handleUnknownPropertyError(propName, tagName, nodeType, lView) {
// Special-case a situation when a structural directive is applied to
// an `<ng-template>` element, for example: `<ng-template *ngIf="true">`.
// In this case the compiler generates the `ɵɵtemplate` instruction with
// the `null` as the tagName. The directive matching logic at runtime relies
// on this effect (see `isInlineTemplate`), thus using the 'ng-template' as
// a default value of the `tNode.value` is not feasible at this moment.
if (!tagName && nodeType === 4 /* TNodeType.Container */) {
tagName = 'ng-template';
}
const isHostStandalone = isHostComponentStandalone(lView);
const templateLocation = getTemplateLocationDetails(lView);
let message = `Can't bind to '${propName}' since it isn't a known property of '${tagName}'${templateLocation}.`;
const schemas = `'${isHostStandalone ? '@Component' : '@NgModule'}.schemas'`;
const importLocation = isHostStandalone
? "included in the '@Component.imports' of this component"
: 'a part of an @NgModule where this component is declared';
if (KNOWN_CONTROL_FLOW_DIRECTIVES.has(propName)) {
// Most likely this is a control flow directive (such as `*ngIf`) used in
// a template, but the directive or the `CommonModule` is not imported.
const correspondingImport = KNOWN_CONTROL_FLOW_DIRECTIVES.get(propName);
message +=
`\nIf the '${propName}' is an Angular control flow directive, ` +
`please make sure that either the '${correspondingImport}' directive or the 'CommonModule' is ${importLocation}.`;
}
else {
// May be an Angular component, which is not imported/declared?
message +=
`\n1. If '${tagName}' is an Angular component and it has the ` +
`'${propName}' input, then verify that it is ${importLocation}.`;
// May be a Web Component?
if (tagName && tagName.indexOf('-') > -1) {
message +=
`\n2. If '${tagName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' ` +
`to the ${schemas} of this component to suppress this message.`;
message +=
`\n3. To allow any property add 'NO_ERRORS_SCHEMA' to ` +
`the ${schemas} of this component.`;
}
else {
// If it's expected, the error can be suppressed by the `NO_ERRORS_SCHEMA` schema.
message +=
`\n2. To allow any property add 'NO_ERRORS_SCHEMA' to ` +
`the ${schemas} of this component.`;
}
}
reportUnknownPropertyError(message);
}
export function reportUnknownPropertyError(message) {
if (shouldThrowErrorOnUnknownProperty) {
throw new RuntimeError(303 /* RuntimeErrorCode.UNKNOWN_BINDING */, message);
}
else {
console.error(formatRuntimeError(303 /* RuntimeErrorCode.UNKNOWN_BINDING */, message));
}
}
/**
* WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)
* and must **not** be used in production bundles. The function makes megamorphic reads, which might
* be too slow for production mode and also it relies on the constructor function being available.
*
* Gets a reference to the host component def (where a current component is declared).
*
* @param lView An `LView` that represents a current component that is being rendered.
*/
export function getDeclarationComponentDef(lView) {
!ngDevMode && throwError('Must never be called in production mode');
const declarationLView = lView[DECLARATION_COMPONENT_VIEW];
const context = declarationLView[CONTEXT];
// Unable to obtain a context.
if (!context)
return null;
return context.constructor ? getComponentDef(context.constructor) : null;
}
/**
* WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)
* and must **not** be used in production bundles. The function makes megamorphic reads, which might
* be too slow for production mode.
*
* Checks if the current component is declared inside of a standalone component template.
*
* @param lView An `LView` that represents a current component that is being rendered.
*/
export function isHostComponentStandalone(lView) {
!ngDevMode && throwError('Must never be called in production mode');
const componentDef = getDeclarationComponentDef(lView);
// Treat host component as non-standalone if we can't obtain the def.
return !!componentDef?.standalone;
}
/**
* WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)
* and must **not** be used in production bundles. The function makes megamorphic reads, which might
* be too slow for production mode.
*
* Constructs a string describing the location of the host component template. The function is used
* in dev mode to produce error messages.
*
* @param lView An `LView` that represents a current component that is being rendered.
*/
export function getTemplateLocationDetails(lView) {
!ngDevMode && throwError('Must never be called in production mode');
const hostComponentDef = getDeclarationComponentDef(lView);
const componentClassName = hostComponentDef?.type?.name;
return componentClassName ? ` (used in the '${componentClassName}' component template)` : '';
}
/**
* The set of known control flow directives and their corresponding imports.
* We use this set to produce a more precises error message with a note
* that the `CommonModule` should also be included.
*/
export const KNOWN_CONTROL_FLOW_DIRECTIVES = new Map([
['ngIf', 'NgIf'],
['ngFor', 'NgFor'],
['ngSwitchCase', 'NgSwitchCase'],
['ngSwitchDefault', 'NgSwitchDefault'],
]);
/**
* Returns true if the tag name is allowed by specified schemas.
* @param schemas Array of schemas
* @param tagName Name of the tag
*/
export function matchingSchemas(schemas, tagName) {
if (schemas !== null) {
for (let i = 0; i < schemas.length; i++) {
const schema = schemas[i];
if (schema === NO_ERRORS_SCHEMA ||
(schema === CUSTOM_ELEMENTS_SCHEMA && tagName && tagName.indexOf('-') > -1)) {
return true;
}
}
}
return false;
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {formatRuntimeError, RuntimeError, RuntimeErrorCode} from '../../errors';\nimport {Type} from '../../interface/type';\nimport {CUSTOM_ELEMENTS_SCHEMA, NO_ERRORS_SCHEMA, SchemaMetadata} from '../../metadata/schema';\nimport {throwError} from '../../util/assert';\nimport {getComponentDef} from '../definition';\nimport {ComponentDef} from '../interfaces/definition';\nimport {TNodeType} from '../interfaces/node';\nimport {RComment, RElement} from '../interfaces/renderer_dom';\nimport {CONTEXT, DECLARATION_COMPONENT_VIEW, LView} from '../interfaces/view';\nimport {isAnimationProp} from '../util/attrs_utils';\n\nlet shouldThrowErrorOnUnknownElement = false;\n\n/**\n * Sets a strict mode for JIT-compiled components to throw an error on unknown elements,\n * instead of just logging the error.\n * (for AOT-compiled ones this check happens at build time).\n */\nexport function ɵsetUnknownElementStrictMode(shouldThrow: boolean) {\n  shouldThrowErrorOnUnknownElement = shouldThrow;\n}\n\n/**\n * Gets the current value of the strict mode.\n */\nexport function ɵgetUnknownElementStrictMode() {\n  return shouldThrowErrorOnUnknownElement;\n}\n\nlet shouldThrowErrorOnUnknownProperty = false;\n\n/**\n * Sets a strict mode for JIT-compiled components to throw an error on unknown properties,\n * instead of just logging the error.\n * (for AOT-compiled ones this check happens at build time).\n */\nexport function ɵsetUnknownPropertyStrictMode(shouldThrow: boolean) {\n  shouldThrowErrorOnUnknownProperty = shouldThrow;\n}\n\n/**\n * Gets the current value of the strict mode.\n */\nexport function ɵgetUnknownPropertyStrictMode() {\n  return shouldThrowErrorOnUnknownProperty;\n}\n\n/**\n * Validates that the element is known at runtime and produces\n * an error if it's not the case.\n * This check is relevant for JIT-compiled components (for AOT-compiled\n * ones this check happens at build time).\n *\n * The element is considered known if either:\n * - it's a known HTML element\n * - it's a known custom element\n * - the element matches any directive\n * - the element is allowed by one of the schemas\n *\n * @param element Element to validate\n * @param lView An `LView` that represents a current component that is being rendered\n * @param tagName Name of the tag to check\n * @param schemas Array of schemas\n * @param hasDirectives Boolean indicating that the element matches any directive\n */\nexport function validateElementIsKnown(\n  element: RElement,\n  lView: LView,\n  tagName: string | null,\n  schemas: SchemaMetadata[] | null,\n  hasDirectives: boolean,\n): void {\n  // If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT\n  // mode where this check happens at compile time. In JIT mode, `schemas` is always present and\n  // defined as an array (as an empty array in case `schemas` field is not defined) and we should\n  // execute the check below.\n  if (schemas === null) return;\n\n  // If the element matches any directive, it's considered as valid.\n  if (!hasDirectives && tagName !== null) {\n    // The element is unknown if it's an instance of HTMLUnknownElement, or it isn't registered\n    // as a custom element. Note that unknown elements with a dash in their name won't be instances\n    // of HTMLUnknownElement in browsers that support web components.\n    const isUnknown =\n      // Note that we can't check for `typeof HTMLUnknownElement === 'function'` because\n      // Domino doesn't expose HTMLUnknownElement globally.\n      (typeof HTMLUnknownElement !== 'undefined' &&\n        HTMLUnknownElement &&\n        element instanceof HTMLUnknownElement) ||\n      (typeof customElements !== 'undefined' &&\n        tagName.indexOf('-') > -1 &&\n        !customElements.get(tagName));\n\n    if (isUnknown && !matchingSchemas(schemas, tagName)) {\n      const isHostStandalone = isHostComponentStandalone(lView);\n      const templateLocation = getTemplateLocationDetails(lView);\n      const schemas = `'${isHostStandalone ? '@Component' : '@NgModule'}.schemas'`;\n\n      let message = `'${tagName}' is not a known element${templateLocation}:\\n`;\n      message += `1. If '${tagName}' is an Angular component, then verify that it is ${\n        isHostStandalone\n          ? \"included in the '@Component.imports' of this component\"\n          : 'a part of an @NgModule where this component is declared'\n      }.\\n`;\n      if (tagName && tagName.indexOf('-') > -1) {\n        message += `2. If '${tagName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the ${schemas} of this component to suppress this message.`;\n      } else {\n        message += `2. To allow any element add 'NO_ERRORS_SCHEMA' to the ${schemas} of this component.`;\n      }\n      if (shouldThrowErrorOnUnknownElement) {\n        throw new RuntimeError(RuntimeErrorCode.UNKNOWN_ELEMENT, message);\n      } else {\n        console.error(formatRuntimeError(RuntimeErrorCode.UNKNOWN_ELEMENT, message));\n      }\n    }\n  }\n}\n\n/**\n * Validates that the property of the element is known at runtime and returns\n * false if it's not the case.\n * This check is relevant for JIT-compiled components (for AOT-compiled\n * ones this check happens at build time).\n *\n * The property is considered known if either:\n * - it's a known property of the element\n * - the element is allowed by one of the schemas\n * - the property is used for animations\n *\n * @param element Element to validate\n * @param propName Name of the property to check\n * @param tagName Name of the tag hosting the property\n * @param schemas Array of schemas\n */\nexport function isPropertyValid(\n  element: RElement | RComment,\n  propName: string,\n  tagName: string | null,\n  schemas: SchemaMetadata[] | null,\n): boolean {\n  // If `schemas` is set to `null`, that's an indication that this Component was compiled in AOT\n  // mode where this check happens at compile time. In JIT mode, `schemas` is always present and\n  // defined as an array (as an empty array in case `schemas` field is not defined) and we should\n  // execute the check below.\n  if (schemas === null) return true;\n\n  // The property is considered valid if the element matches the schema, it exists on the element,\n  // or it is synthetic.\n  if (matchingSchemas(schemas, tagName) || propName in element || isAnimationProp(propName)) {\n    return true;\n  }\n\n  // Note: `typeof Node` returns 'function' in most browsers, but is undefined with domino.\n  return typeof Node === 'undefined' || Node === null || !(element instanceof Node);\n}\n\n/**\n * Logs or throws an error that a property is not supported on an element.\n *\n * @param propName Name of the invalid property\n * @param tagName Name of the tag hosting the property\n * @param nodeType Type of the node hosting the property\n * @param lView An `LView` that represents a current component\n */\nexport function handleUnknownPropertyError(\n  propName: string,\n  tagName: string | null,\n  nodeType: TNodeType,\n  lView: LView,\n): void {\n  // Special-case a situation when a structural directive is applied to\n  // an `<ng-template>` element, for example: `<ng-template *ngIf=\"true\">`.\n  // In this case the compiler generates the `ɵɵtemplate` instruction with\n  // the `null` as the tagName. The directive matching logic at runtime relies\n  // on this effect (see `isInlineTemplate`), thus using the 'ng-template' as\n  // a default value of the `tNode.value` is not feasible at this moment.\n  if (!tagName && nodeType === TNodeType.Container) {\n    tagName = 'ng-template';\n  }\n\n  const isHostStandalone = isHostComponentStandalone(lView);\n  const templateLocation = getTemplateLocationDetails(lView);\n\n  let message = `Can't bind to '${propName}' since it isn't a known property of '${tagName}'${templateLocation}.`;\n\n  const schemas = `'${isHostStandalone ? '@Component' : '@NgModule'}.schemas'`;\n  const importLocation = isHostStandalone\n    ? \"included in the '@Component.imports' of this component\"\n    : 'a part of an @NgModule where this component is declared';\n  if (KNOWN_CONTROL_FLOW_DIRECTIVES.has(propName)) {\n    // Most likely this is a control flow directive (such as `*ngIf`) used in\n    // a template, but the directive or the `CommonModule` is not imported.\n    const correspondingImport = KNOWN_CONTROL_FLOW_DIRECTIVES.get(propName);\n    message +=\n      `\\nIf the '${propName}' is an Angular control flow directive, ` +\n      `please make sure that either the '${correspondingImport}' directive or the 'CommonModule' is ${importLocation}.`;\n  } else {\n    // May be an Angular component, which is not imported/declared?\n    message +=\n      `\\n1. If '${tagName}' is an Angular component and it has the ` +\n      `'${propName}' input, then verify that it is ${importLocation}.`;\n    // May be a Web Component?\n    if (tagName && tagName.indexOf('-') > -1) {\n      message +=\n        `\\n2. If '${tagName}' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' ` +\n        `to the ${schemas} of this component to suppress this message.`;\n      message +=\n        `\\n3. To allow any property add 'NO_ERRORS_SCHEMA' to ` +\n        `the ${schemas} of this component.`;\n    } else {\n      // If it's expected, the error can be suppressed by the `NO_ERRORS_SCHEMA` schema.\n      message +=\n        `\\n2. To allow any property add 'NO_ERRORS_SCHEMA' to ` +\n        `the ${schemas} of this component.`;\n    }\n  }\n\n  reportUnknownPropertyError(message);\n}\n\nexport function reportUnknownPropertyError(message: string) {\n  if (shouldThrowErrorOnUnknownProperty) {\n    throw new RuntimeError(RuntimeErrorCode.UNKNOWN_BINDING, message);\n  } else {\n    console.error(formatRuntimeError(RuntimeErrorCode.UNKNOWN_BINDING, message));\n  }\n}\n\n/**\n * WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)\n * and must **not** be used in production bundles. The function makes megamorphic reads, which might\n * be too slow for production mode and also it relies on the constructor function being available.\n *\n * Gets a reference to the host component def (where a current component is declared).\n *\n * @param lView An `LView` that represents a current component that is being rendered.\n */\nexport function getDeclarationComponentDef(lView: LView): ComponentDef<unknown> | null {\n  !ngDevMode && throwError('Must never be called in production mode');\n\n  const declarationLView = lView[DECLARATION_COMPONENT_VIEW] as LView<Type<unknown>>;\n  const context = declarationLView[CONTEXT];\n\n  // Unable to obtain a context.\n  if (!context) return null;\n\n  return context.constructor ? getComponentDef(context.constructor) : null;\n}\n\n/**\n * WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)\n * and must **not** be used in production bundles. The function makes megamorphic reads, which might\n * be too slow for production mode.\n *\n * Checks if the current component is declared inside of a standalone component template.\n *\n * @param lView An `LView` that represents a current component that is being rendered.\n */\nexport function isHostComponentStandalone(lView: LView): boolean {\n  !ngDevMode && throwError('Must never be called in production mode');\n\n  const componentDef = getDeclarationComponentDef(lView);\n  // Treat host component as non-standalone if we can't obtain the def.\n  return !!componentDef?.standalone;\n}\n\n/**\n * WARNING: this is a **dev-mode only** function (thus should always be guarded by the `ngDevMode`)\n * and must **not** be used in production bundles. The function makes megamorphic reads, which might\n * be too slow for production mode.\n *\n * Constructs a string describing the location of the host component template. The function is used\n * in dev mode to produce error messages.\n *\n * @param lView An `LView` that represents a current component that is being rendered.\n */\nexport function getTemplateLocationDetails(lView: LView): string {\n  !ngDevMode && throwError('Must never be called in production mode');\n\n  const hostComponentDef = getDeclarationComponentDef(lView);\n  const componentClassName = hostComponentDef?.type?.name;\n  return componentClassName ? ` (used in the '${componentClassName}' component template)` : '';\n}\n\n/**\n * The set of known control flow directives and their corresponding imports.\n * We use this set to produce a more precises error message with a note\n * that the `CommonModule` should also be included.\n */\nexport const KNOWN_CONTROL_FLOW_DIRECTIVES = new Map([\n  ['ngIf', 'NgIf'],\n  ['ngFor', 'NgFor'],\n  ['ngSwitchCase', 'NgSwitchCase'],\n  ['ngSwitchDefault', 'NgSwitchDefault'],\n]);\n/**\n * Returns true if the tag name is allowed by specified schemas.\n * @param schemas Array of schemas\n * @param tagName Name of the tag\n */\nexport function matchingSchemas(schemas: SchemaMetadata[] | null, tagName: string | null): boolean {\n  if (schemas !== null) {\n    for (let i = 0; i < schemas.length; i++) {\n      const schema = schemas[i];\n      if (\n        schema === NO_ERRORS_SCHEMA ||\n        (schema === CUSTOM_ELEMENTS_SCHEMA && tagName && tagName.indexOf('-') > -1)\n      ) {\n        return true;\n      }\n    }\n  }\n\n  return false;\n}\n"]}