This is a sample script for setting the line space of paragraphs on Google Documents using Google Apps Script.
When the line space of a paragraph on Google Documents is manually set, you can do it as follows.
When it is set with Google Apps Script, the following script can be used.
function sample1() {
const doc = DocumentApp.getActiveDocument();
const body = doc.getBody();
const paragraph = body.appendParagraph(
"sample paragraph 1\nsample paragraph 2\nsample paragraph 3"
);
paragraph.setLineSpacing(2); // Double
}
When this script is run, the appended paragraphs have a line space of 2 (Double).
Here, when the numbers less than 1 are used to setLineSpacing like setLineSpacing(0.8), the line space becomes 1 without errors, while the numbers more than 1 like 2, 3, and 10 are used, those can be used with setLineSpacing. From this situation, it seems that in the current stage, setLineSpacing cannot be used for a number less than 1. I’m not sure whether this is the current specification or a bug.
When you want to set the numbers less than 1 to the line space, in the current stage, it is required to use Google Docs API. When Google Docs API is used, numbers less than 1 can be used for the line space. The sample script is as follows.
function sample2() {
const doc = DocumentApp.getActiveDocument();
doc
.getBody()
.appendParagraph(
"sample paragraph 1\nsample paragraph 2\nsample paragraph 3"
);
doc.saveAndClose();
const id = doc.getId();
const { startIndex, endIndex } = Docs.Documents.get(id).body.content.pop();
const requests = [
{
updateParagraphStyle: {
paragraphStyle: { lineSpacing: 80 },
range: { startIndex, endIndex },
fields: "lineSpacing",
},
},
];
Docs.Documents.batchUpdate({ requests }, id);
}
When this script is run, the appended paragraphs have a line space of 0.8 (Custom line space).
References
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From this official document, it says as follows.
lineSpacing: The amount of space between lines, as a percentage of normal, where normal is represented as 100.0. If unset, the value is inherited from the parent.
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I answered this sample script to this thread in Stackoverflow.