1 | var toValueString = require('./toValueString')
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2 |
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3 | var isUndefined = require('./isUndefined')
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4 |
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5 | var helperStringRepeat = require('./helperStringRepeat')
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6 |
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7 |
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8 |
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9 |
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10 |
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11 |
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12 |
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13 |
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14 |
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15 | function padStart (str, targetLength, padString) {
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16 | var rest = toValueString(str)
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17 | targetLength = targetLength >> 0
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18 | padString = isUndefined(padString) ? ' ' : '' + padString
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19 | if (rest.padStart) {
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20 | return rest.padStart(targetLength, padString)
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21 | }
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22 | if (targetLength > rest.length) {
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23 | targetLength -= rest.length
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24 | if (targetLength > padString.length) {
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25 | padString += helperStringRepeat(padString, targetLength / padString.length)
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26 | }
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27 | return padString.slice(0, targetLength) + rest
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28 | }
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29 | return rest
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30 | }
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31 |
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32 | module.exports = padStart
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