编辑代码

const a = [
    {
        "awardId": "173147721500001",
        "probability": "100",
        "revealFlag": "1"
    },
    {
        "awardId": "173147721500001",
        "probability": "200",
        "revealFlag": "1"
    },
     {
        "awardId": "173147721500001",
        "probability": "100",
        "revealFlag": "1"
    }
]


const data = a.map(item =>item.probability)


const total = data.reduce((p,c)=> {
    console.log(p,c)
    return Number(p || 0) + Number(c || 0)
}, 0)


console.log(total)