Version of JSON.stringify limitied to a specific depth.

stringify.js

function stringifyMaxDepth (obj, depth = 1) {
    // recursion limited by depth arg
    if (!obj || typeof obj !== 'object') return JSON.stringify(obj)

    let curDepthResult = '"<?>"' // too deep
    if (depth > 0) {
        curDepthResult = Object.keys(obj)
            .map( (key) => {
                let val = stringifyMaxDepth(obj[key], depth - 1)
                if (val === undefined) val = 'null'
                return `"${key}": ${val}`
            })
            .join(', ')
        curDepthResult = `{${curDepthResult}}`
    }

    return JSON.stringify(JSON.parse(curDepthResult))
}