JavaScript / HTML5 新闻

查找和替换 JavaScript 电子表格中的数据

4月 29, 2025
为电子表格 Web 应用程序配备灵活且高级的查找和替换功能，从而简化更新内容的过程。

Find and replace functionality in a spreadsheet application enables users to quickly search for specific text, numbers, or characters within a worksheet and substitute them with alternative content. Often including advanced options such as case sensitivity, regular expressions, and the ability to target specific sheets or cell ranges, this feature lets users make consistent updates across large datasets without manually editing each cell. By automating these repetitive tasks, it reduces the risk of human error and significantly enhances productivity and accuracy in data processing. It is particularly useful for correcting errors, updating outdated information, or standardizing entries, such as changing all instances of an old product name to a new one.

Several JavaScript spreadsheet controls offer find and replace functionality, including:

  • SpreadJS by MESCIUS equips JavaScript developers with the ability to perform search and replace operations via a dialog, supporting advanced options like case matching.
  • Jspreadsheet Pro is a data grid with spreadsheet controls, providing JavaScript applications with find and replace functionality via an advanced search and replace extension.
  • Syncfusion Spreadsheet JavaScript (part of Syncfusion Essential Studio Enterprise) facilitates flexible find and replace capabilities to simplify targeted editing.

For an in-depth analysis of features and price, visit our comparison of JavaScript spreadsheet controls.

Compare JavaScript Spreadsheet Controls

用密码保护来保护 PDF 文件

4月 25, 2025
通过使用密码控制用户访问和权限，以确保 PDF 文档中的数据机密性和完整性。

PDF password protection is a security feature that restricts access to the PDF file by requiring a password to open, modify, print or copy its contents. By setting either an open password (to prevent unauthorized viewing) or a permissions password (to control actions such as editing or printing), this mechanism ensures that document owners can safeguard sensitive information against unauthorized access or tampering. This is particularly useful in professional and legal contexts where data confidentiality and document integrity are critical, helping to maintain compliance with privacy standards and internal data protection policies.

Several JavaScript PDF components allow you to protect PDFs with passwords, including:

  • Wijmo PDF (part of Wijmo by MESCIUS) provides JavaScript components that allow you secure PDF files via password protection to restrict access and content manipulation.
  • Aspose.PDF for JavaScript via C++ enables you to implement user and master passwords programmatically for fine-grained control over who can view or manipulate PDF content.
  • IronPDF for Node.js by Iron Software equips JavaScript-based web applications with the ability to protect PDFs with passwords to ensure confidentiality and controlled user access.

For an in-depth analysis of features and price, visit our comparison of JavaScript PDF components.

Compare JavaScript PDF Components

用手动报表预览缩短加载时间

4月 25, 2025
Telerik Reporting 2025 Q1 为 Blazor 和 Angular 引入了用户触发的报表预览，从而提高了渲染效率。

Telerik Reporting is a comprehensive and lightweight embedded reporting tool for .NET web and desktop applications. It enables developers and reporting users to create, design, and export visually appealing, interactive, and reusable reports to effectively present analytical and business data. It supports various technologies, including ASP.NET Core, Blazor, ASP.NET MVC, ASP.NET AJAX, HTML5/JS, Angular, WPF, WinForms, and WinUI.

The Telerik Reporting 2025 Q1 update introduces user-initiated initial report preview in the native Blazor and Angular viewers, giving developers greater control over how and when reports are rendered. Instead of automatically generating reports on viewer load, this feature allows end users to manually trigger the preview process. This improvement helps reduce unnecessary data processing and improves application performance, particularly in scenarios involving large datasets or complex report logic. It also supports more efficient resource management on both the client and server sides, enabling developers to create faster, more responsive, and user-friendly reporting experiences.

To see a full list of what's new in 2025 Q1 (19.0.25.211), see our release notes.

Telerik Reporting is licensed per developer and has two licensing models: an annual Subscription License and a Perpetual License. The Subscription license provides access to the latest product updates, technical support, and exclusive benefits for a flat annual fee, and must be renewed to continue using the software. The Perpetual license is a one-time purchase granting access to the current released version and includes a one-year subscription for product updates and technical support. After this initial period, users can choose to renew the subscription element to continue receiving updates and support; otherwise, they may continue using the installed version available during their active subscription term but will forgo future updates and support. See our Telerik Reporting licensing page for full details.

Telerik Reporting is available to buy in the following products:

从 PDF 中删除敏感信息

4月 23, 2025
Document Solutions for PDF v8.1 添加密文注释，以永久删除机密数据，如姓名、地址或财务详细信息。

Document Solutions for PDF (DsPdf) by MESCIUS is a software development toolkit that provides .NET Core libraries and a JavaScript PDF viewer for manipulating and displaying PDFs. DsPdf enables developers to create, edit, annotate, and redact PDF documents directly within web applications. The included DsPdfViewer component offers a feature-rich, cross-platform solution for viewing and interacting with PDFs in modern browsers on various operating systems, including mobile devices.

The Document Solutions for PDF v8.1 update introduces robust redaction capabilities to the DsPdfViewer/Wasm, allowing users to add, edit, and apply redact annotations directly within the browser - without the need for a .NET server. This feature, available through the Professional DsPdfViewer license with WebAssembly (Wasm) SupportApi, ensures sensitive information can be securely removed or hidden with ease, enhancing compliance and document control in client-side PDF workflows.

To see a full list of what's new in version 8.1.0, see our release notes.

Document Solutions for PDF is licensed per developer and is available in several license options for differing distribution needs. Team licenses are also available for multiple developers within the same organization. See our Document Solutions for PDF licensing page for full details.

Document Solutions for PDF is available to buy individually or as part of Document Solutions .NET Bundle.

用动态时间线图表可视化趋势

4月 23, 2025
amCharts 5 添加一个独特的时间线图，使用蛇形和螺旋布局实现节省空间且视觉上有趣的线性数据表示。

amCharts: Charts is a versatile and user-friendly JavaScript library designed for seamless data visualization across a wide range of applications. This ready-made solution helps users to integrate interactive charts without the need to learn complex new technologies. Featuring built-in support for TypeScript and ES6 modules, amCharts: Charts offers full compatibility with popular front-end frameworks such as Angular, React, and Vue.js. Its flexibility and ease of use make it an ideal choice for developers seeking a powerful yet simple drop-in solution to create engaging and informative data visualizations for dashboards and data analytics.

The amCharts 5.12.0 update introduces a new Timeline chart type, providing developers with a specialized component for visualizing linear datasets in a space-efficient manner. This chart facilitates the creation of two-dimensional plots that can be rendered along serpentine, spiral, or fully customized paths. By deviating from traditional linear axes, the Timeline chart offers a unique approach to presenting chronological or sequential data, potentially enhancing user engagement and providing alternative perspectives on data distribution without requiring complex configurations beyond standard XY chart principles. This new chart type inherits core functionalities from existing XY charts, ensuring a familiar development experience while offering a distinct visual representation option.

To see a full list of what's new in amCharts 5: Charts (version 5.12.0), see our release notes.

amCharts is licensed per developer on an annual or perpetual basis, with options for websites, SaaS and OEM distribution. See our amCharts 5: Charts licensing page for full details.

For more information, visit our amCharts 5: Charts product page.