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13 lines
471 B
13 lines
471 B
//判断是否为线上订单
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export const startsWith = (mainStr, prefix) => {
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// 处理前缀为空字符串的情况（空字符串是所有字符串的前缀）
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if (prefix === '') {
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return true;
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}
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// 处理主字符串长度小于前缀长度的情况
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if (mainStr.length < prefix.length) {
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return false;
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}
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// 比较主字符串开头与前缀相同长度的部分
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return mainStr.substring(0, prefix.length) === prefix;
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}
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