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overlay.js
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Wed, Feb 5, 08:00

overlay.js
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// The error overlay is inspired (and mostly copied) from Create React App (https://github.com/facebookincubator/create-react-app)
// They, in turn, got inspired by webpack-hot-middleware (https://github.com/glenjamin/webpack-hot-middleware).
import ansiHTML from "ansi-html-community";
import { encode } from "html-entities";
var colors = {
reset: ["transparent", "transparent"],
black: "181818",
red: "E36049",
green: "B3CB74",
yellow: "FFD080",
blue: "7CAFC2",
magenta: "7FACCA",
cyan: "C3C2EF",
lightgrey: "EBE7E3",
darkgrey: "6D7891"
};
/** @type {HTMLIFrameElement | null | undefined} */
var iframeContainerElement;
/** @type {HTMLDivElement | null | undefined} */
var containerElement;
/** @type {Array<(element: HTMLDivElement) => void>} */
var onLoadQueue = [];
/** @type {TrustedTypePolicy | undefined} */
var overlayTrustedTypesPolicy;
ansiHTML.setColors(colors);
/**
* @param {string | null} trustedTypesPolicyName
*/
function createContainer(trustedTypesPolicyName) {
// Enable Trusted Types if they are available in the current browser.
if (window.trustedTypes) {
overlayTrustedTypesPolicy = window.trustedTypes.createPolicy(trustedTypesPolicyName || "webpack-dev-server#overlay", {
createHTML: function createHTML(value) {
return value;
}
});
}
iframeContainerElement = document.createElement("iframe");
iframeContainerElement.id = "webpack-dev-server-client-overlay";
iframeContainerElement.src = "about:blank";
iframeContainerElement.style.position = "fixed";
iframeContainerElement.style.left = 0;
iframeContainerElement.style.top = 0;
iframeContainerElement.style.right = 0;
iframeContainerElement.style.bottom = 0;
iframeContainerElement.style.width = "100vw";
iframeContainerElement.style.height = "100vh";
iframeContainerElement.style.border = "none";
iframeContainerElement.style.zIndex = 9999999999;
iframeContainerElement.onload = function () {
containerElement =
/** @type {Document} */
/** @type {HTMLIFrameElement} */
iframeContainerElement.contentDocument.createElement("div");
containerElement.id = "webpack-dev-server-client-overlay-div";
containerElement.style.position = "fixed";
containerElement.style.boxSizing = "border-box";
containerElement.style.left = 0;
containerElement.style.top = 0;
containerElement.style.right = 0;
containerElement.style.bottom = 0;
containerElement.style.width = "100vw";
containerElement.style.height = "100vh";
containerElement.style.backgroundColor = "rgba(0, 0, 0, 0.85)";
containerElement.style.color = "#E8E8E8";
containerElement.style.fontFamily = "Menlo, Consolas, monospace";
containerElement.style.fontSize = "large";
containerElement.style.padding = "2rem";
containerElement.style.lineHeight = "1.2";
containerElement.style.whiteSpace = "pre-wrap";
containerElement.style.overflow = "auto";
var headerElement = document.createElement("span");
headerElement.innerText = "Compiled with problems:";
var closeButtonElement = document.createElement("button");
closeButtonElement.innerText = "X";
closeButtonElement.style.background = "transparent";
closeButtonElement.style.border = "none";
closeButtonElement.style.fontSize = "20px";
closeButtonElement.style.fontWeight = "bold";
closeButtonElement.style.color = "white";
closeButtonElement.style.cursor = "pointer";
closeButtonElement.style.cssFloat = "right"; // @ts-ignore
closeButtonElement.style.styleFloat = "right";
closeButtonElement.addEventListener("click", function () {
hide();
});
containerElement.appendChild(headerElement);
containerElement.appendChild(closeButtonElement);
containerElement.appendChild(document.createElement("br"));
containerElement.appendChild(document.createElement("br"));
/** @type {Document} */
/** @type {HTMLIFrameElement} */
iframeContainerElement.contentDocument.body.appendChild(containerElement);
onLoadQueue.forEach(function (onLoad) {
onLoad(
/** @type {HTMLDivElement} */
containerElement);
});
onLoadQueue = [];
/** @type {HTMLIFrameElement} */
iframeContainerElement.onload = null;
};
document.body.appendChild(iframeContainerElement);
}
/**
* @param {(element: HTMLDivElement) => void} callback
* @param {string | null} trustedTypesPolicyName
*/
function ensureOverlayExists(callback, trustedTypesPolicyName) {
if (containerElement) {
// Everything is ready, call the callback right away.
callback(containerElement);
return;
}
onLoadQueue.push(callback);
if (iframeContainerElement) {
return;
}
createContainer(trustedTypesPolicyName);
} // Successful compilation.
function hide() {
if (!iframeContainerElement) {
return;
} // Clean up and reset internal state.
document.body.removeChild(iframeContainerElement);
iframeContainerElement = null;
containerElement = null;
}
/**
* @param {string} type
* @param {string | { file?: string, moduleName?: string, loc?: string, message?: string }} item
* @returns {{ header: string, body: string }}
*/
function formatProblem(type, item) {
var header = type === "warning" ? "WARNING" : "ERROR";
var body = "";
if (typeof item === "string") {
body += item;
} else {
var file = item.file || ""; // eslint-disable-next-line no-nested-ternary
var moduleName = item.moduleName ? item.moduleName.indexOf("!") !== -1 ? "".concat(item.moduleName.replace(/^(\s|\S)*!/, ""), " (").concat(item.moduleName, ")") : "".concat(item.moduleName) : "";
var loc = item.loc;
header += "".concat(moduleName || file ? " in ".concat(moduleName ? "".concat(moduleName).concat(file ? " (".concat(file, ")") : "") : file).concat(loc ? " ".concat(loc) : "") : "");
body += item.message || "";
}
return {
header: header,
body: body
};
} // Compilation with errors (e.g. syntax error or missing modules).
/**
* @param {string} type
* @param {Array<string | { file?: string, moduleName?: string, loc?: string, message?: string }>} messages
* @param {string | null} trustedTypesPolicyName
*/
function show(type, messages, trustedTypesPolicyName) {
ensureOverlayExists(function () {
messages.forEach(function (message) {
var entryElement = document.createElement("div");
var typeElement = document.createElement("span");
var _formatProblem = formatProblem(type, message),
header = _formatProblem.header,
body = _formatProblem.body;
typeElement.innerText = header;
typeElement.style.color = "#".concat(colors.red); // Make it look similar to our terminal.
var text = ansiHTML(encode(body));
var messageTextNode = document.createElement("div");
messageTextNode.innerHTML = overlayTrustedTypesPolicy ? overlayTrustedTypesPolicy.createHTML(text) : text;
entryElement.appendChild(typeElement);
entryElement.appendChild(document.createElement("br"));
entryElement.appendChild(document.createElement("br"));
entryElement.appendChild(messageTextNode);
entryElement.appendChild(document.createElement("br"));
entryElement.appendChild(document.createElement("br"));
/** @type {HTMLDivElement} */
containerElement.appendChild(entryElement);
});
}, trustedTypesPolicyName);
}
export { formatProblem, show, hide };

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