How does Vue realize the function of converting numbers to Chinese?

Vue.js is a modern JavaScript framework that more and more people are using to build front-end applications. During the development process, it is often necessary to convert numbers into Chinese to meet different business needs, such as displaying amounts, generating order numbers, etc. Let's introduce how to use Vue.js to convert numbers into Chinese.

1. Understand the representation method of Chinese numbers

Before converting numbers into Chinese, we need to first understand the representation method of Chinese numbers. Chinese numbers include ten base numbers: zero, one, two, three, four, five, six, seven, eight, nine, and four units: ten, one hundred, one thousand, and ten thousand. When the value is greater than 10,000, group it by 10,000, with up to four digits in each group, for example:

• One hundred and fifty: 150
• Fifteen thousand and twenty: 15020
• One hundred and one hundred thousand and one hundred: 1010100

2. Implement the number conversion method

In Vue.js, we can use the computed attribute to define The method of converting a number into Chinese is as follows:

computed: {
  chineseNumber () {
    return this.toChineseNumber(this.number)
  }
},
methods: {
  toChineseNumber(number) {
    const CHINESE_NUMBERS = ['零', '一', '二', '三', '四', '五', '六', '七', '八', '九']
    const CHINESE_UNITS = ['', '十', '百', '千']
    const CHINESE_GROUP_UNITS = ['', '万', '亿', '万亿']

    if (number === 0) return '零'

    let [integer, decimal] = number.toString().split('.')
    let integerPart = ''
    let decimalPart = ''

    if (integer !== '0') {
      integerPart = integer
        .split('')
        .reverse()
        .map((value, index) => {
          return CHINESE_NUMBERS[value] + (value === '0' ? '' : CHINESE_UNITS[index % 4])
        })
        .reverse()
        .join('')
        .replace(/零+/g, '零')
        .replace(/零$/g, '')
    }

    if (decimal) {
      decimalPart = decimal
        .split('')
        .map(value => CHINESE_NUMBERS[value])
        .join('')
    }

    return integerPart + (decimalPart ? '点' + decimalPart : '') || '零'
  }
}

The implementation idea of ​​this method is as follows:

1. Split the number into an integer part and a decimal part according to the decimal point.
2. To convert the integer part into Chinese, first reverse the integer part, and then use the numbers defined by CHINESE_NUMBERS and the units defined by CHINESE_UNITS to convert bit by bit. Note that GROUP_UNIT units need to be added for every four-digit group.
3. Perform processing such as deduplication and trailing zeros on the converted results.
4. If there is a decimal part, convert it directly to Chinese, and use "dots" to connect the result to the integer part. If there is no decimal part, it defaults to zero.

3. Use the number to Chinese method in the application

It is very simple to use the number to Chinese method in the Vue.js application. You only need to use {{ chineseNumber }} in the template. Just show the calculated results. For example:

<p>金额：{{ amount }} 元</p>
<p>中文：{{ chineseNumber }}</p>

4. Online example and summary

Now, we have implemented a simple method of converting numbers to Chinese and can use it in Vue.js applications. Using the calculated properties of Vue.js, you can easily realize real-time conversion of numbers and conveniently meet the needs of different business scenarios.

You can try running the above code in this online example and verify it yourself.

In short, Vue.js is a powerful front-end framework. When we need to develop business functions such as converting numbers to Chinese, we can use its convenient and flexible features to achieve efficient functions through simple code.

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