@blueprintjs/core
Version:
Core styles & components
121 lines • 4.71 kB
JavaScript
;
/*
* Copyright 2020 Palantir Technologies, Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.isReact18OrHigher = exports.isElementOfType = exports.isReactElement = exports.ensureElement = exports.isReactChildrenElementOrElements = exports.isReactNodeEmpty = void 0;
var tslib_1 = require("tslib");
var React = tslib_1.__importStar(require("react"));
var jsUtils_1 = require("./jsUtils");
/**
* Returns true if `node` is null/undefined, false, empty string, or an array
* composed of those. If `node` is an array, only one level of the array is
* checked, for performance reasons.
*/
function isReactNodeEmpty(node, skipArray) {
if (skipArray === void 0) { skipArray = false; }
return (node == null ||
node === "" ||
node === false ||
(!skipArray &&
Array.isArray(node) &&
// only recurse one level through arrays, for performance
(node.length === 0 || node.every(function (n) { return isReactNodeEmpty(n, true); }))));
}
exports.isReactNodeEmpty = isReactNodeEmpty;
/**
* Returns true if children are a mappable children array
*
* @internal
*/
function isReactChildrenElementOrElements(children) {
return !isReactNodeEmpty(children, true) && children !== true;
}
exports.isReactChildrenElementOrElements = isReactChildrenElementOrElements;
/**
* Converts a React node to an element. Non-empty strings, numbers, and Fragments will be wrapped in given tag name;
* empty strings and booleans will be discarded.
*
* @param child the React node to convert
* @param tagName the HTML tag name to use when a wrapper element is needed
* @param props additional props to spread onto the element, if any. If the child is a React element and this argument
* is defined, the child will be cloned and these props will be merged in.
*/
function ensureElement(child, tagName, props) {
if (tagName === void 0) { tagName = "span"; }
if (props === void 0) { props = {}; }
if (child == null || typeof child === "boolean" || (0, jsUtils_1.isEmptyString)(child)) {
return undefined;
}
else if (typeof child === "string" ||
typeof child === "number" ||
isReactFragment(child) ||
isReactNodeArray(child)) {
// wrap the child element
return React.createElement(tagName, props, child);
}
else if (isReactElement(child)) {
if (Object.keys(props).length > 0) {
// clone the element and merge props
return React.cloneElement(child, props);
}
else {
// nothing to do, it's a valid ReactElement
return child;
}
}
else {
// child is inferred as {}
return undefined;
}
}
exports.ensureElement = ensureElement;
function isReactElement(child) {
return (typeof child === "object" &&
typeof child.type !== "undefined" &&
typeof child.props !== "undefined");
}
exports.isReactElement = isReactElement;
function isReactFragment(child) {
// bit hacky, but generally works
return typeof child.type === "symbol";
}
function isReactNodeArray(child) {
return Array.isArray(child);
}
/**
* Returns true if the given JSX element matches the given component type.
*
* NOTE: This function only checks equality of `displayName` for performance and
* to tolerate multiple minor versions of a component being included in one
* application bundle.
*
* @param element JSX element in question
* @param ComponentType desired component type of element
*/
// eslint-disable-next-line @typescript-eslint/no-empty-object-type
function isElementOfType(element, ComponentType) {
return (element != null &&
element.type != null &&
element.type.displayName != null &&
element.type.displayName === ComponentType.displayName);
}
exports.isElementOfType = isElementOfType;
function isReact18OrHigher() {
var majorVersion = parseInt(React.version.split(".")[0], 10);
return majorVersion >= 18;
}
exports.isReact18OrHigher = isReact18OrHigher;
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