// ==UserScript==
// @name         ChatGPT 代码预览助手 - Code Previewer for ChatGPT
// @namespace    http://xyde.net.cn
// @version      1.5
// @description  Preview HTML code on chatgpt.com by adding an iframe below code blocks with class 'language-html'. Allows downloading of the HTML preview.
// @author       You
// @match        https://chatgpt.com/*
// @grant        none
// @license      MIT
// ==/UserScript==
(function() {
'use strict';
// Function to create preview container
function createPreviewContainer(htmlCode, id) {
// Create container div
const container = document.createElement('div');
container.style.border = '1px solid #ddd';
container.style.borderRadius = '5px';
container.style.marginTop = '10px';
container.style.padding = '10px';
container.style.backgroundColor = '#f9f9f9';
container.style.boxShadow = '0 2px 4px rgba(0,0,0,0.1)';
container.style.position = 'relative'; // Ensure relative positioning
container.id = 'container-' + id;
// Create title
const title = document.createElement('div');
title.textContent = 'HTML Code Preview 网页代码预览';
title.style.fontWeight = 'bold';
title.style.marginBottom = '10px';
title.style.textAlign = 'center';
// Create iframe
const iframe = document.createElement('iframe');
iframe.className = 'html-preview-iframe';
iframe.style.width = '100%';
iframe.style.height = '300px';
iframe.style.border = 'none';
iframe.id = 'code-preview-' + id;
// Wait for iframe to load before setting content
iframe.onload = function() {
const doc = iframe.contentDocument || iframe.contentWindow.document;
doc.open();
doc.write(htmlCode);
doc.close();
};
// Create download button
const downloadButton = document.createElement('a');
downloadButton.href = 'data:text/html;charset=utf-8,' + encodeURIComponent(htmlCode);
downloadButton.download = 'preview.html';
downloadButton.innerHTML = `
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="16" height="16" style="position: absolute; top: 5px; right: 5px; cursor: pointer;">
<path d="M12 15.41l6.29-6.29 1.41 1.41L12 18.23 4.3 10.12l1.41-1.41z"/>
</svg>
`;
downloadButton.style.position = 'absolute';
downloadButton.style.top = '5px';
downloadButton.style.right = '5px';
downloadButton.style.cursor = 'pointer';
// Append title, iframe, and download button to container
container.appendChild(title);
container.appendChild(downloadButton);
container.appendChild(iframe);
return container;
}
// Function to find and process code elements
function processCodeElements() {
// Find all code elements with class 'language-html'
const codeElements = document.querySelectorAll('code.language-html');
// Iterate through each code element
codeElements.forEach(codeElement => {
// Check if it has already been processed
if (codeElement.dataset.previewed){
if(new Date().getSeconds() % 5 != 0){
return;
}
let iframeToRemove = document.querySelector("#container-" + codeElement.dataset.id);
iframeToRemove.parentNode.removeChild(iframeToRemove);
}
// Mark as previewed
codeElement.dataset.previewed = true;
codeElement.dataset.id = Math.ceil(Math.random()*100000);
// Get parent element of code block
const parentElement = codeElement.closest('.flex-col');
// Create a preview container
const previewContainer = createPreviewContainer(codeElement.textContent, codeElement.dataset.id);
// Insert container below the code element
parentElement.appendChild(previewContainer);
});
}
// Run processCodeElements initially and then every 3 seconds
processCodeElements();
setInterval(processCodeElements, 3000);
})();