Question

我有一个像

这样的文字

hello everyone. My name is PETER. hahahah ahahah ....

如果我有一个固定的宽度，我怎么能自动换行这个文本使文本变成这样：

hello everyone.
My name is
PETER. hahahah
ahahah

Answer 1

您可以对行长度进行限制并迭代分割的字符串。

＆＃13;

var string = 'hello everyone. My name is PETER. hahahah ahahah ....',
    limit = 15,
    result = string.split(' ').reduce(function (r, s) {
        var line = r[r.length - 1] || '';
        line += (line && ' ') + s;
        if (r.length && line.length <= limit) {
            r[r.length - 1] = line;
        } else {
            r.push(s);
        }
        return r;
    }, []).join('\n');

console.log(result);

＆＃13;

Answer 2

我会使用像：

这样的函数

＆＃13;

const string = "hello everyone. My name is PETER. hahahah ahahah ...."

function autoLineBreaker(string, maxLength = 7) {
    const tableString = string.split(' ')
    let result = ""
    let intermediaryLength = 0
    for (let i = 0; i < tableString.length; i++) {
        const currentWord = tableString[i]
        if (intermediaryLength + currentWord.length > maxLength) {
            result += ` ${currentWord} \n`
            intermediaryLength = 0
        } else {
            result += ` ${currentWord}`
            intermediaryLength += currentWord.length
        }
    }
    return result
}

console.log(autoLineBreaker(string))

＆＃13;

如果您还热衷于ES8语法和函数编程，可以使用此函数的工厂来避免传递长度。语法是一个更进化的版本：

＆＃13;

const string = "hello everyone. My name is PETER. hahahah ahahah ...."
const makeAutoLinebreakerES8 = length => string => {
        let intermediaryLength = 0
        return string.split(' ').reduce((finalString, current) => {
            intermediaryLength = (intermediaryLength + current.length > length) ?
                0 : intermediaryLength + current.length
            return finalString + (intermediaryLength ? ` ${current}` : ` ${current} \n`)
        }, "")
    }
    //example is a function
const exampleWithLengthSeven = makeAutoLinebreakerES8(7)
console.log("ES8 : \n" + exampleWithLengthSeven(string))

＆＃13;

在javascript中自动换行

2 个答案: