Slide

This article provides a series of examples that demonstrate how to work with slides using Aspose.Slides for Node.js via Java. You’ll learn how to add, access, clone, reorder, and remove slides using the Presentation class.

Each example below includes a brief explanation followed by a code snippet in JavaScript.

Add a Slide

To add a new slide, you must first select a layout. In this example, we use the Blank layout and add an empty slide to the presentation.

function addSlide() {
    let presentation = new aspose.slides.Presentation();
    try {
        let layoutType = java.newByte(aspose.slides.SlideLayoutType.Blank);
        let layoutSlide = presentation.getLayoutSlides().getByType(layoutType);
        presentation.getSlides().addEmptySlide(layoutSlide);

        presentation.save("slide.pptx", aspose.slides.SaveFormat.Pptx);
    } finally {
        presentation.dispose();
    }
}

💡 Note: Each slide layout is derived from a master slide, which defines the overall design and placeholder structure. The image below illustrates how master slides and their associated layouts are organized in PowerPoint.

Access Slides by Index

You can access slides using their index. This is useful for iterating through or modifying specific slides.

function accessSlide() {
    let presentation = new aspose.slides.Presentation("slide.pptx");
    try {
        // Access a slide by index.
        let firstSlide = presentation.getSlides().get_Item(0);
    } finally {
        presentation.dispose();
    }
}

Clone a Slide

This example demonstrates how to clone an existing slide. The cloned slide is automatically added to the end of the slide collection.

function cloneSlide() {
    let presentation = new aspose.slides.Presentation();
    try {
        let firstSlide = presentation.getSlides().get_Item(0);
        let clonedSlide = presentation.getSlides().addClone(firstSlide);

        presentation.save("slide_cloned.pptx", aspose.slides.SaveFormat.Pptx);
    } finally {
        presentation.dispose();
    }
}

Reorder Slides

You can change the order of slides by moving one to a new index. In this case, we move a slide to the first position.

function reorderSlide() {
    let presentation = new aspose.slides.Presentation("slide.pptx");
    try {
        // Reorder slides by moving the second slide to the first position.
        let secondSlide = presentation.getSlides().get_Item(1);
        presentation.getSlides().reorder(0, secondSlide);

        presentation.save("slide_reordered.pptx", aspose.slides.SaveFormat.Pptx);
    } finally {
        presentation.dispose();
    }
}

Remove a Slide

To remove a slide, simply reference it and call remove. This example adds a second slide and then removes the original, leaving only the new one.

function removeSlide() {
    let presentation = new aspose.slides.Presentation("slide.pptx");
    try {
        let firstSlide = presentation.getSlides().get_Item(0);
        presentation.getSlides().remove(firstSlide);

        presentation.save("slide_removed.pptx", aspose.slides.SaveFormat.Pptx);
    } finally {
        presentation.dispose();
    }
}