Category
How to Insert Excel Formulas and Functions in JavaScript (React)
2026-09-18 08:14:02
A generated spreadsheet full of pre-computed numbers is a snapshot. It looks right the moment it is produced and starts aging immediately: the data behind it moves on, the numbers inside it do not, and once the file has left your application nobody can tell which cells they are allowed to change. A workbook that carries its formulas instead stays a live document — edit an input, and the totals follow.
How to Convert PDF Pages to Images in JavaScript (React)
2026-09-11 09:55:36
You build a document list for a client, and the client asks: "can I see the pages before downloading?" Just like that, you own a rendering feature you did not plan for. The same request shows up everywhere — a thumbnail strip under an inbox, a preview card pasted into a chat, a slide pulled from a deck and posted to social. In every case a PDF cannot be shown inline, but a picture of its pages can.
Replacing and Removing Images from PDFs in JavaScript (React)
2026-09-11 09:51:17
A PDF you produced last quarter still circulates internally, but its logo was rebranded last month and one chart shows numbers that are no longer true. You don't want to rebuild the document from scratch — you just need to swap the outdated image for the new one, or strip out an obsolete stamp or watermark entirely.
Extract Images from a PDF in JavaScript (React)
2026-09-11 09:46:47
You received a 40-page report and need the eight charts inside it for a slide deck, or you want to pull product photos out of a supplier's catalog. The catch: a PDF stores images in an internal stream format that the browser's built-in APIs can't read, so there is no "right-click, save image" path.
Converting Images to PDF in JavaScript (React)
2026-09-09 09:52:03
A folder of images is awkward to hand to someone. A PDF is one file, opens everywhere, prints predictably, and — the part people actually care about — holds a fixed order. That is why scanned pages, photo sets, receipt photos, and exported design frames so often get assembled into a PDF before they go anywhere.
How to Add Images to a PDF in JavaScript (React)
2026-09-08 05:37:09
Table of Contents Why generate PDFs in the browser Prerequisites Add an image to a new PDF Add an image to an existing PDF Scaling and positioning Add images to multiple pages Download the result FAQ See Also Install with NPM Related Links DownloadSpire.Office for JavaScript text When your React app builds PDFs on the fly — an invoice that needs a company logo, a report with an embedded chart, a certificate carrying a signature — you have to place raster images onto the page programmatically. Plain JavaScript can't write into a PDF's internal structure, and standing up a backend…