xpath to select a pattern with any number + "specific string"

Question

xpath for such span with text containing a number and a string

<span>10 days</span> 

I have tried this one - //span[contains(text(), 'days') and matches(text(), '\d+ days')] but its not working

Answer 1

XPath 1.0 doesn't support regexps. Fortunately, ^\d+ days$ is simple enough for you to write an equivalent condition with the limited set of string functions that XPath 1.0 provides:

//span[
    substring-after(text()," ") = "days" and
    substring-before(text()," ") != "" and
    translate(substring-before(text()," "), "0123456789", "") = ""
]

---

example

input:

<div>
    <!-- matching examples -->
    <span>10 days</span>
    <span>365 days</span>
    <span>2 days</span>

    <!-- non-matching examples -->
    <span> days</span>
    <span>100 </span>
    <span>X days</span>
    <span>10 months</span>
    <span> 3 days</span>
    <span>4 days </span>
    <span>5  days</span>
    <span>6days</span>
</div>

result:

10 days
365 days
2 days