What does `% s` mean in JavaScript?

What does s mean in

JavaScript? For example, there is this in the following code:

metaInfo: {
        title: "",
        titleTemplate: "%s - Hello",
        meta: [
            {name: "keywords", content: ""},
            {name: "description", content: ""}
        ]
    }
May.22,2021

has nothing to do with js , this is the package own convention, similar to ${title}-Hello .

Source code getMetaInfo.js-sharpL155

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b4341b-2c675.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b4341b-2c675.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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